176 Fluoride Vol. 35 No Research Report DETERMINATION OF FLUORIDE IN WATER RESIDUES BY PROTON INDUCED GAMMA EMISSION MEASUREMENTS
|
|
- Clarence Harrison
- 5 years ago
- Views:
Transcription
1 176 Fluoride Vol. 35 No Research Report DETERMINATION OF FLUORIDE IN WATER RESIDUES BY PROTON INDUCED GAMMA EMISSION MEASUREMENTS AKM Fazlul Hoque, a M Khaliquzzaman, b MD Hossain, c AH Khan d Dhaka, Bangladesh SUMMARY: A multielement proton induced gamma emission (PIGE) method has been developed to analyze fluoride in water residues obtained by evaporation. In this method, 200 ml of water sample mixed with 100 mg of cellulose powder is evaporated, and the residue is made into standard pellets that are then irradiated with a 2.9 MeV proton beam. The emitted γ-rays from the decay of the excited fluorine nuclei are detected with a high resolution, high purity germanium (HPGe) detector and analyzed using a commercial gamma ray spectrum unfolding software. For concentration calibration, synthetic fluoride standards of different concentrations, as NaF in a CaCO 3 matrix, were prepared and homogenized by dispersing them in methanol. The method thus developed was applied to determine the concentration of fluoride in 85 water samples collected from different city supplies of Bangladesh. The concentration ranged from 0.03 to 1.10 mg/l with the mean of 0.32 ± 0.21 mg/l. Keywords: Bangladesh, Fluoride analysis, Proton induced gamma emission, Water fluoride concentration, Water residue. INTRODUCTION Pollution of the biosphere with fluoride is a human health concern in many parts of the world. The fluoride content of drinking water is a very important factor from the health point of view. Dental researchers have reported that the supplementation of fluoride in drinking water improves the resistance to dental caries. 1-3 However, recent studies by public health dentists in New Zealand, Canada, the United Kingdom, and the United States have indicated that no such benefit from water fluoridation is observed. 4-7 On the other hand, there are reports that excessive fluoride intake causes fluorosis, cancer, arthritis, and other diseases It has also been observed that fluorine in excess affects human intelligence, especially in children, who are most susceptible to early fluoride toxicity. 9,12 Chronic fluoride intoxication (fluorosis) has been reported not only in humans but also in domestic animals, such as, cattle, buffaloes, sheep, and goats. 13 Different analytical methods using nuclear reactions have been reported for determination of fluoride in samples related to geology, odontology, medicine, metallurgy, environment, etc Determination of fluoride using photon activation analysis is very sensitive but it requires pyrolysis or hydropyrolysis or distillation to separate fluoride from inter- a For Correspondence: Dr AKM Fazlul Hoque, Accelerator Facilities Division, Atomic Energy Centre, P.O. Box 164, Dhaka , Bangladesh. fhoque@bttb.net.bd b World Bank Dhaka office, Consultant, Environment Team, 3A Paribagh, Dhaka; c Physics Department, Jahangirnagar University, Savar, Dhaka; d Chemistry Department, Dhaka University, Dhaka, Bangladesh.
2 Fluoride analysis by proton induced gamma emission 177 fering substances. 15 In fast neutron activation analysis using 19 F(n, α) 16 N, 19 F(n, γ) 20 F, etc, the sensitivity is not sufficient to determine more than a few µg/g (ppm) of fluoride in samples. 15 In ion beam analysis with 19 F(p, α 1 e - e + ) 16 O de-excitation takes place mainly through internal pair production, by which an electron and a positron are created and the inelastically scattered particles are detected in coincidence with the emitted photon. 16 A signal with very low background is obtained, but the yield is very low because of the coincidence condition. Proton induced gamma emission (PIGE) is also a nuclear reaction based analytical method. Initially, it was developed at the 3 MeV Van de Graaff Accelerator Laboratory of the Atomic Energy Centre, Dhaka (AECD) for non-destructive analysis of fluoride in human teeth. 19 Subsequently, knowing the multielement capability of the method, it was employed for analyzing the light elements in environmental samples including fluoride in drinking water. The present work is thus an expansion of the scope of the application of PIGE in environmental and human health studies, where it is necessary to analyze water, food, etc. for specific information of human health significance. Generally, fluoride ions in water are analyzed by spectrophotometry, ion sensitive electrode (ISE), and ion-chromatography. Each of the methods has its own limitations and advantages. 20 Spectrophotometry of fluoride in water using alizarin is not interference free, and for low concentrations it requires distillation, which is time consuming. Ion chromatography is costly, and although it can analyze multianionic samples, high concentrations of chloride ion interfere with the determination of fluoride. ISE is a very useful method for quantitative analysis of fluoride ions in water down to the concentration of 0.1 mg/l. However, the ionic strength of the solution has to be adjusted for different samples to minimize interference. If organic acids and boron are present in water, distillation is necessary. Compared to these methods of fluoride analysis in water, the PIGE method has the advantage of being isotopic in nature with virtually no interference; sensitivity is high, and it has the multielement capability like ion chromatography. Sample preparation steps are mostly physical in nature, and thus sample contamination is minimal. Moreover, since the same experimental setup is used for determining fluoride in teeth, with the only expense being that of sample preparation, the method provides a nondestructive procedure for analysis that is advantageous for large-scale screening where sensitivity is important. PIGE analysis of fluoride reported in this work is based on the detection of the gamma rays emitted on proton interaction with 19 F. The en-
3 178 Hoque, Khaliquzzaman, Hossain, Khand ergy of the gamma ray indicates the isotope that is present, and the intensity is a measure of the concentration of the isotope in the sample. MATERIALS AND METHODS Sample preparation: A 200 ml water sample together with 100 mg of ashless cellulose powder (Whatman) was evaporated to dryness in a porcelain dish on a steam bath and then under an infra-red lamp. The residue was cooled at room temperature in a desiccator for 1 hr. The powdered sample was then weighed and sealed in a polythene bag and stored in a desiccator. A 50 mg sample was pressed into a 10 mm diameter pellet with 3 tons of pressure in a graduated hydraulic press. The pellet was mounted on a 35 mm slide frame with adhesive tape and preserved in a desiccator until irradiated. A 200 ml de-ionized water mixed with 100 mg of cellulose was prepared in the same way as the blank and analyzed for any contamination in sample preparation. Concentration calibration: In order to determine the concentration of fluoride in water samples for concentration calibration shown in Figure 1, AnalaR grade NaF in the concentration range of mg/kg in a CaCO 3 matrix was used. The nuclear reaction 19 F(p, p γ) 19 F is used to construct the calibration curve. 600 Fluoride (mg/kg) in sample pellet y = x R 2 = Counts per µc Figure 1. Calibration curve for the determination of fluoride in water residue. NaF standards were homogeneously dispersed in 100 mg of CaCO 3 with methanol, and the resulting matrices were dried under an infrared lamp.
4 Fluoride analysis by proton induced gamma emission 179 Weighed 50 mg samples were then pressed into pellets. As a test for homogeneity, irradiation of three 50 mg pellets gave reproducible results within ± 5%. The calibration curve was correct within this uncertainty. In real sample analysis, this calibration was used to determine the concentration of fluoride in water residues on dry weight basis (mg/kg). These data were then converted to mg F/L of water samples with respect to 200 ml of each analyte sample. Method of analysis: The schematic diagram of both the internal/external beam PIGE setup is shown in Figure 2. Two tantalum collimators, each of 2 mm diameter, and a 4 mm diameter cleanup aperture, were used to obtain a finely collimated beam. In internal beam PIGE, sample excitation and gamma-ray emission are performed within the vacuum chamber. A high purity germanium (HPGe) detector in the first position in Figure 2 is used for γ-ray analysis. Figure 2. Schematic diagram of the external/internal beam of the PIGE experimental system. In the external beam technique, samples are irradiated in air, where a wide variety of samples can be irradiated easily by extracting the proton beam through the Be window sufficiently strong to hold vacuum in the accelerator tube. The great advantage of the external beam technique is the reduction of charge build up on the sample during irradiation. Polyimide films (Kapton brand) of 1.12 mg/cm 2 thickness were used to extract the proton beams from the beam port into the air. The set up is de-
5 180 Hoque, Khaliquzzaman, Hossain, Khand signed to hold a 35 mm slide frame for solid samples at an angle of 45 relative to the beam direction, and the characteristic γ-rays are detected at 90 with respect to the beam. The total proton charge on the sample and the kapton window, from the beam port and the collimators, was integrated with a charge integrator. The external beam is most useful for irradiation of samples of different shape and size. Because of limitations in geometry, internal beam irradiation is more restrictive. The analyzed proton beam energy was 2.9 MeV. The proton energy on the target after absorption at the exit window and the air between the window and the sample is estimated to be 2.3 MeV. Each sample was irradiated for a preset charge of 20 µc with a beam intensity of 15 na. The characteristic γ- rays were detected with a high purity germanium (HPGe) detector having a resolution of 1.75 kev at 1332 kev γ-rays. Standard NIM electronics and a 4095 channels pulse analyzer were used for data acquisition and analysis. The inelastic scattering of protons on 19 F leads to the emission of gamma quanta from the first and second excited states of the 19 F nucleus with energies of 110 and 197 kev, which have very high production cross sections that do not interfere with other γ-rays. These gamma lines can also be produced in the 18 O(p, γ) 19 F reaction, but because of relative low abundance (0.2%) and low proton interaction cross section of 18 O, the contribution from this reaction can be ignored without much error. A typical PIGE spectrum of a water residue sample is illustrated in Figure 3. The gamma ray spectrum was analyzed using a commercially available γ-ray unfolding software obtained from APTEC Nuclear Inc. USA Na-23 Counts 4000 F-19 F Gamma ray energy (kev) Figure 3. Gamma ray spectrum from water residue.
6 Fluoride analysis by proton induced gamma emission 181 RESULTS AND DISCUSSION The bulk of the water residue obtained after evaporation consists mostly of carbonates and bicarbonates. The weight of the residue obtained from different samples varied from 0.01 to 0.30 g. Under these conditions, it was assumed that the matrix composition consists predominantly of H, C, and O. Thus, CaCO 3 was chosen as the carrier for calibration with known amounts of NaF. Some water samples were analyzed by the fluoride ion selective electrode (ISE) method, considered to be the most appropriate one for fluoride in water. The results are shown in Figure 4 along with those from PIGE measurements for comparison. The two results agree within ± 11%. The correspondence between the two results indicates the accuracy of the PIGE methodology. The reproducibility of the results has been tested by measuring the fluoride content of the same sample several times. For 5 replicate measurements, the standard deviation was ± 0.03 mg/kg at the concentration level of 0.60 mg/kg. Fluoride concentration (mg/l) ISE PIGE Sample Figure 4. Fluoride measurements of water samples using ISE and PIGE methods. Minimum detection limit (MDL) The MDL is defined as the amount of an element in mg/kg that yields a γ- ray intensity equal to 3 σ of the background under the peak in an interval equal to the full width at half maximum (FWHM). The MDL for water residue of 200 ml water containing 100 mg cellulose and for a 20 µc irradiation charge was 0.2 mg/kg on the dry weight basis of the water residue,
7 182 Hoque, Khaliquzzaman, Hossain, Khand which corresponds to approximately mg F/L in the original water sample. Fluoride levels in city supply waters of Bangladesh The mean fluoride concentration in water supplies of 11 major cities is shown in Figure 5. The concentration range of fluoride in 85 different city water supplies as observed in this study was mg/l, with the mean of 0.32 ± 0.21 mg/l. It appears from the results that fluoride levels in most of the city supplies are lower than the WHO recommended maximum of 1.5 mg/l for drinking water. 21 The results further indicate that the external beam PIGE method is a sensitive and reliable nuclear analytical method for fluoride analysis in water residues preconcentrated on cellulose powder by evaporation. Vegetables, fruits and other food samples may also be analyzed by PIGE with higher sensitivity down to the fluoride level of 1 mg/kg dry weight basis and minimum sample preparation. Fluoride concentration (mg/l) Barisal Bogra Chittagong Comilla Dhaka Dinajpur City Gazipur Mymensigh Rajshahi Sylhet Tangail Figure 5. Mean concentration of fluoride in 11 city water supplies of Bangladesh. An important advantage of the PIGE method, in addition to its high sensitivity, is its ability to determine simultaneously a number of low Z elements, especially lithium, boron, fluorine, etc. in health related environmental samples. The non-destructive analysis of human teeth for fluoride levels in large
8 Fluoride analysis by proton induced gamma emission 183 scale screening is the distinct advantage of the PIGE method reported elsewhere. 19 It can be used as a method that is complementary to proton induced X-ray emission (PIXE) for multielement trace analysis in different disciplines reported earlier from this laboratory. 22 ACKNOWLEDGMENT The authors wish to acknowledge the cooperation of the colleagues of the Accelerator Facilities Division and the Chemistry Division of AECD during the course of this work. The partial financial support received from the Ministry of Science and Technology, Government of Bangladesh, under the special grant program for carrying out this research is gratefully acknowledged. REFERENCES 1 Green JC, Louie R, Wycoff SJ. Preventive Dentistry I. Dental Caries. JAMA 1989;262: Szpunar SM, Burt BA. Dental caries, fluorosis and fluoride exposure in Michigan school children. J Dent Res 1988;67: World Health Organization. Fluoridation and Dental Health. WHO Chron 1969;23: Colquhoun J. Is there a dental benefit from water fluoride? Fluoride 1994; 27(1): Gray AS. Fluoridation: Time for a new baseline? J Can Dent Assoc 1987; 53: Schatz A, Martin JJ. The failure of fluoridation in the United Kingdom. Pakistan Dent Rev 1972;22: Yiamouyiannis J. Water fluoridation and tooth decay: Results from the national survey of U.S. school children. Fluoride 1990;23(2): Yiamouyiannis J. Fluoride the Aging Factor, 3 rd ed. Delaware (Ohio, USA): Health Action Press; Waldbott GL. The preskeletal phase of chronic fluoride intoxication. Fluoride 1998;31(1): Maurer JK, Cheng MC, Boysen BG, Anderson RI. Two year carcinogenicity study of sodium fluoride in rats. J Nat Cancer Inst 1990;82: Cohn PD. An Epidemiological Report on Drinking Water Fluoridation and Osteosarcoma in Young Males. New Jersey Department of Health, Environmental Health Service, Trenton, NJ. Nov. 8, Li XS, Zhi JL, Gao RO. Effect of fluoride exposure on intelligence in children. Fluoride 1995;28(4): Choubisa SL. Fluorosis in some tribal villages of Udaipur district (Rajasthan). J Environ Biol 1998;19: Yin F, Yao Y, Liu CC, Wen ML. Developments in the analysis of fluoride Fluoride 2001;34(2): Sakurai H, Fukuda M, Hayashibe Y, Sayama Y, Masumoto K, Ohtsuki T. Determination of fluorine in standard rocks by photon activation analysis. J Radioanal Nucl Chem 1997;217(2):
9 184 Hoque, Khaliquzzaman, Hossain, Khand 16 Sjoland KA, Kristiansson P, Elfman M, Malmqvist KG, Pallon J, Utui RJ, Yang C. Investigation of the 19 F(p, α 1 e - e + ) 16 O reaction for use in ion beam analysis. Nucl Instrum Methods Phys Res Sect B 2000; : Calastrini F, Del Carmine P, Lucarelli F, Mando PA, Prati P, Zucchiatti A. External beam PIGE for fluorine determination in atmospheric aerosol. Nucl Instrum Methods Phys Res Sect B 1998; : Jankuhn S, Vogt J, Butz T. Determination of the elemental status of ancient human bones from Bockenheim/Rheinland-Ofalz by PIGE and PIXE. Nucl Instrum Methods Phys Res Sect B 2000; : Fazlul Hoque AKM. Analytical Application of Charged Particle Induced Nuclear Reactions for Low Mass Elemental Analysis. PhD Dissertation, Physics Department, Jahangirnagar University, December Fresenius N, Quentin GE, Schneider W. Editors. Water Analysis. New York: Springer-Verlag; World Health Organization (WHO). Guidelines for drinking water quality. Second Edition. 1993;1: Ali M. X-ray Analytical Studies of Trace Elements in Food and Drink: A Nutritional Assessment in Bangladesh. PhD Dissertation, Department of Chemistry, Jahangirnagar University, June Published by the International Society for Fluoride Research Editorial Office: 727 Brighton Road, Ocean View, Dunedin 9051, New Zealand
MEASUREMENT OF THE CONCENTRATIONS OF FLUORINE IN THE SOIL OF DIFFERENT AREAS OF SAVAR AND ITS EFFECTS ON ENVIRONMENT
BRAC University Journal, Vol. IV No. 1, 2007, pp. 13-17 MEASUREMENT OF THE CONCENTRATIONS OF FLUORINE IN THE SOIL OF DIFFERENT AREAS OF SAVAR AND ITS EFFECTS ON ENVIRONMENT Md. Anisur Rahaman Molla Department
More informationFLUORINE IN WATER AND TEETH MEASURED WITH PIGE
2005 International Nuclear Atlantic Conference - INAC 2005 Santos, SP, Brazil, August 28 to September 2, 2005 ASSOCIAÇÃO BRASILEIRA DE ENERGIA NUCLEAR - ABEN ISBN: 85-99141-01-5 FLUORINE IN WATER AND TEETH
More informationMajor Nuclear and Radiation Physics experimental facilities in. Prepared By Dr M Tanseer Ali
Major Nuclear and Radiation Physics experimental facilities in Prepared By Dr M Tanseer Ali Research Facilities Atomic Energy Centre (AECD), Dhaka Ministry of Science and Technology Atomic Energy Research
More informationCOMPARATIVE STUDY OF PIGE, PIXE AND NAA ANALYTICAL TECHNIQUES FOR THE DETERMINATION OF MINOR ELEMENTS IN STEELS
COMPARATIVE STUDY OF PIGE, PIXE AND NAA ANALYTICAL TECHNIQUES FOR THE DETERMINATION OF MINOR ELEMENTS IN STEELS ANTOANETA ENE 1, I. V. POPESCU 2, T. BÃDICÃ 3, C. BEªLIU 4 1 Department of Physics, Faculty
More informationNeutron activation analysis. Contents. Introduction
Neutron activation analysis Contents Neutron activation analysis... 1 Introduction... 1 Principle of method... 2 Detection of radionuclides... 3 Kinetics of activation... 4 Choosing the appropriate procedure...
More informationMedical Neutron Science
Medical Neutron Science 03 Neutron Activation Analysis The use of NAA techniques for medical applications was first reported in 1964 for measurement of sodium in the body J. Anderson, SB S.B. Ob Osborn,
More informationGeometric Considerations in the
Geometric Considerations in the Calibration of Germanium Detectors for Analytics, Inc. examines geometric questions involved in calibrating and counting filter papers using germanium detector, gamma-ray
More informationRelease of Per- and polyfluoroalkyl Substances (PFASs) from Carpet and Clothing in Model Anaerobic Landfill Reactors. Supporting Information
Release of Per- and polyfluoroalkyl Substances (PFASs) from Carpet and Clothing in Model Anaerobic Landfill Reactors Supporting Information Johnsie R. Lang a*, B. McKay Allred b, Graham F. Peaslee c, Jennifer
More informationInternational Journal of Scientific & Engineering Research, Volume 5, Issue 3, March-2014 ISSN
316 Effective atomic number of composite materials by Compton scattering - nondestructive evaluation method Kiran K U a, Ravindraswami K b, Eshwarappa K M a and Somashekarappa H M c* a Government Science
More informationWithin the vast field of atomic physics, collisions of heavy ions with atoms define
Chapter 1 Introduction Within the vast field of atomic physics, collisions of heavy ions with atoms define one of the most active areas of research. In the last decades, the design and construction of
More informationIdentification of Naturally Occurring Radioactive Material in Sand
Identification of Naturally Occurring Radioactive Material in Sand Michael Pope 2012 NSF/REU Program Physics Department, University of Notre Dame Advisors: Dr. Ed Stech, Dr. Michael Wiescher Abstract Radionuclides
More informationarxiv:nucl-ex/ v2 21 Jul 2005
Gamma-spectrometric uranium age-dating using intrinsic efficiency calibration arxiv:nucl-ex/0506029v2 21 Jul 2005 Cong Tam Nguyen and József Zsigrai Institute of Isotopes of the Hungarian Academy of Sciences
More informationQUIZ: Physics of Nuclear Medicine Atomic Structure, Radioactive Decay, Interaction of Ionizing Radiation with Matter
QUIZ: Physics of Nuclear Medicine Atomic Structure, Radioactive Decay, Interaction of Ionizing Radiation with Matter 1. An atomic nucleus contains 39 protons and 50 neutrons. Its mass number (A) is a)
More informationName Date Class NUCLEAR RADIATION. alpha particle beta particle gamma ray
25.1 NUCLEAR RADIATION Section Review Objectives Explain how an unstable nucleus releases energy Describe the three main types of nuclear radiation Vocabulary radioisotopes radioactivity radiation alpha
More informationSYSTEM FOR PIXE TRACE ELEMENT ANALYSIS AT MTF. M. Beňo, J. Dobrovodský, D. Vaňa, S. Minárik
SYSTEM FOR PIXE TRACE ELEMENT ANALYSIS AT MTF M. Beňo, J. Dobrovodský, D. Vaňa, S. Minárik Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava (MTF), Advanced
More informationPartial Neutron Capture Cross Section Determination of 237 Np, 242
Partial Neutron Capture Cross Section Determination of 237 Np, 242 Pu and 241 Am using Cold Neutron Beams Christoph Genreith 1, Matthias Rossbach 1 1 Institute of Energy and Climate Research, IEK-6, Forschungszentrum
More informationThe scanning microbeam PIXE analysis facility at NIRS
Nuclear Instruments and Methods in Physics Research B 210 (2003) 42 47 www.elsevier.com/locate/nimb The scanning microbeam PIXE analysis facility at NIRS Hitoshi Imaseki a, *, Masae Yukawa a, Frank Watt
More informationA Brief Overview of Radiation and Analytical Water Testing for Radiological Contaminants.
A Brief Overview of Radiation and Analytical Water Testing for Radiological Contaminants. James Henitz Radioanalytical Services NJ Water Monitoring Council: January 24, 2018 Overview of Presentation What
More informationSECTION 8 Part I Typical Questions
SECTION 8 Part I Typical Questions 1. For a narrow beam of photons, the relaxation length is that thickness of absorber that will result in a reduction of in the initial beam intensity. 1. 1/10. 2. 1/2.
More informationGAMMA RAY SPECTROSCOPY
GAMMA RAY SPECTROSCOPY Gamma Ray Spectroscopy 1 In this experiment you will use a sodium iodide (NaI) detector along with a multichannel analyzer (MCA) to measure gamma ray energies from energy level transitions
More informationCharacterizing New Multi-Channel Peak Sensing ADC-Mesytec MADC-32
Armenian Journal of Physics, 2016, vol. 9, issue 1, pp. 29-33 Characterizing New Multi-Channel Peak Sensing ADC-Mesytec MADC-32 A. Gyurjinyan 1,2, R. Avetisyan 1,2 1 Experimental Physics Division, Yerevan
More informationPARAMETERISATION OF FISSION NEUTRON SPECTRA (TRIGA REACTOR) FOR NEUTRON ACTIVATION WITHOUT THE USED OF STANDARD
Parameterisation of Fission Neutron Spectra (TRIGA Reactor) 81 7 PARAMETERISATION OF FISSION NEUTRON SPECTRA (TRIGA REACTOR) FOR NEUTRON ACTIVATION WITHOUT THE USED OF STANDARD Liew Hwi Fen Noorddin Ibrahim
More informationarxiv: v1 [physics.ins-det] 3 Feb 2011
Nuclear Instruments and Methods in Physics Research A 00 (2018) 1 5 Alogo.pdf Nuclear Instruments and Methods in Physics Research A Scintillation decay time and pulse shape discrimination in oxygenated
More informationIsotopes: atoms with the same Z but different A s (number of neutrons varies)
All atomic nuclei have protons and neutrons, except hydrogen. Z = atomic number = number of protons in the nucleus A = mass number = Z + number of neutrons A Z X Isotopes: atoms with the same Z but different
More informationPhysics 126 Practice Exam #4 Professor Siegel
Physics 126 Practice Exam #4 Professor Siegel Name: Lab Day: 1. Light is usually thought of as wave-like in nature and electrons as particle-like. In which one of the following instances does light behave
More informationCollimated LaBr 3 detector response function in radioactivity analysis of nuclear waste drums
Nuclear Science and Techniques 4 (13) 63 Collimated LaBr 3 detector response function in radioactivity analysis of nuclear waste drums QIAN Nan 1 WANG Dezhong 1,* WANG Chuan ZHU Yuelong MAUERHOFER Eric
More informationSIMULATION OF LASER INDUCED NUCLEAR REACTIONS
NUCLEAR PHYSICS SIMULATION OF LASER INDUCED NUCLEAR REACTIONS K. SPOHR 1, R. CHAPMAN 1, K. LEDINGHAM 2,3, P. MCKENNA 2,3 1 The Institute of Physical Research, University of Paisley, Paisley PA1 2BE, UK
More informationFission fragment mass distributions via prompt γ -ray spectroscopy
PRAMANA c Indian Academy of Sciences Vol. 85, No. 3 journal of September 2015 physics pp. 379 384 Fission fragment mass distributions via prompt γ -ray spectroscopy L S DANU, D C BISWAS, B K NAYAK and
More informationUV Spectroscopy Determination of Aqueous Lead and Copper Ions in Water
UV Spectroscopy Determination of Aqueous Lead and Copper Ions in Water C. H. Tan a, Y. C. Moo a, M. Z. Matjafri a and H. S. Lim a a School of Physics, Universiti Sains Malaysia, 118 Pulau Pinang, Malaysia.
More informationDetection and measurement of gamma-radiation by gammaspectroscopy
Detection and measurement of gamma-radiation by gammaspectroscopy Gamma-radiation is electromagnetic radiation having speed equal to the light in vacuum. As reaching a matter it interact with the different
More informationA Measurement of Monoenergetic Neutrons from 9 Be(p,n) 9 B
Journal of the Korean Physical Society, Vol. 32, No. 4, April 1998, pp. 462 467 A Measurement of Monoenergetic Neutrons from 9 Be(p,n) 9 B J. H. Kim, H. Bhang, J. H. Ha, J. C. Kim, M. J. Kim, Y. D. Kim
More informationMethod Abstract. Flow Solution Fluoride, USGS by ISE and FIA
Scope Summary Interferences Fluoride, USGS by ISE and FIA This method is used for the determination of fluoride in drinking water, surface water, and domestic and industrial wastes according to USGS Method
More informationChapter 10. Section 10.1 What is Radioactivity?
Chapter 10 Section 10.1 What is Radioactivity? What happens when an element undergoes radioactive decay? How does radiation affect the nucleus of an unstable isotope? How do scientists predict when an
More informationP7 Radioactivity. Student Book answers. P7.1 Atoms and radiation. Question Answer Marks Guidance
P7. Atoms and radiation a radiation from U consists = particles, radiation from lamp = electromagnetic waves, radiation from U is ionising, radiation from lamp is non-ionising b radioactive atoms have
More informationRadiation Detection for the Beta- Delayed Alpha and Gamma Decay of 20 Na. Ellen Simmons
Radiation Detection for the Beta- Delayed Alpha and Gamma Decay of 20 Na Ellen Simmons 1 Contents Introduction Review of the Types of Radiation Charged Particle Radiation Detection Review of Semiconductor
More informationStudy of Natural and Artificial Radioactivity in some Food Grains
SCIREA Journal of Food http://www.scirea.org/journal/food November 21, 2016 Volume 1, Issue1, October 2016 Study of Natural and Artificial Radioactivity in some Food Grains Jannatul Ferdous 1*, Projit
More informationNUCL 3000/5030 Laboratory 2 Fall 2013
Lab #2: Passive Gamma Spec Measurements in Decoding Natural Radioactivity in SLC Area Objectives a. Learn basics of gamma spectroscopy b. Learn the equipment in Counting stations #4, #5 and #8 c. Apply
More informationMeasurements of liquid xenon s response to low-energy particle interactions
Measurements of liquid xenon s response to low-energy particle interactions Payam Pakarha Supervised by: Prof. L. Baudis May 5, 2013 1 / 37 Outline introduction Direct Dark Matter searches XENON experiment
More informationanti-compton BGO detector
1 2 3 Q β - measurements with a total absorption detector composed of through-hole HPGe detector and anti-compton BGO detector 4 5 Hiroaki Hayashi a,1, Michihiro Shibata b, Osamu Suematsu a, Yasuaki Kojima
More informationMegan E. Bennett, Dmitriy A. Mayorov, Kyle D. Chapkin, Marisa C. Alfonso, Tyler A. Werke, and Charles M. Folden III
Measurement of the nat Lu(p,x) 175 Hf excitation function Megan E. Bennett, Dmitriy A. Mayorov, Kyle D. Chapkin, Marisa C. Alfonso, Tyler A. Werke, and Charles M. Folden III 1. Introduction It is of great
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 19 Modern Physics Nuclear Physics Nuclear Reactions Medical Applications Radiation Detectors Chapter 29 http://www.physics.wayne.edu/~alan/2140website/main.htm 1 Lightning
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lightning Review Lecture 19 Modern Physics Nuclear Physics Nuclear Reactions Medical Applications Radiation Detectors Chapter 29 http://www.physics.wayne.edu/~alan/2140website/main.htm
More informationRadioactivity. Lecture 6 Detectors and Instrumentation
Radioactivity Lecture 6 Detectors and Instrumentation The human organs Neither humans nor animals have an organ for detecting radiation from radioactive decay! We can not hear it, smell it, feel it or
More informationDEVELOPMENT OF A NEW POSITRON LIFETIME SPECTROSCOPY TECHNIQUE FOR DEFECT CHARACTERIZATION IN THICK MATERIALS
Copyright JCPDS - International Centre for Diffraction Data 2004, Advances in X-ray Analysis, Volume 47. 59 DEVELOPMENT OF A NEW POSITRON LIFETIME SPECTROSCOPY TECHNIQUE FOR DEFECT CHARACTERIZATION IN
More informationDetermination of Total Bromine and Iodine Emission Spectrometric Method (ICP-OES) EuSalt/AS
Determination of Total Bromine and Iodine Page 2 of 5 1. SCOPE AND FIELD OF APPLICATION The present EuSalt Analytical Standard describes an inductively coupled plasma optical emission spectrometry method
More informationGeant4 Monte Carlo code application in photon interaction parameter of composite materials and comparison with XCOM and experimental data
Indian Journal of Pure & Applied Physics Vol. 54, Februray 2016, pp. 137-143 Geant4 Monte Carlo code application in photon interaction parameter of composite materials and comparison with XCOM and experimental
More informationDeuteron activation cross section measurements at the NPI cyclotron
Nuclear Physics Institute Řež EAF 2011 Deuteron activation cross section measurements at the NPI cyclotron E. Šimečková, P. Bém, M. Honusek, J. Mrázek, M. Štefánik, L. Závorka Nuclear Physics Institute
More informationThe 46g BGO bolometer
Nature, 3 The g BGO bolometer 1 Photograph of the heat [g BGO] and light [Ge; =5 mm] bolometers: see Fig. 1c for description Current events: Amplification gains: 8, (heat channel) &, (light channel). The
More informationIntroduction to Radiological Sciences Neutron Detectors. Theory of operation. Types of detectors Source calibration Survey for Dose
Introduction to Radiological Sciences Neutron Detectors Neutron counting Theory of operation Slow neutrons Fast neutrons Types of detectors Source calibration Survey for Dose 2 Neutrons, what are they?
More informationUranium Concentrations measurement for Ground Water and Soil Samples in Al-Najaf/Iraq
IOSR Journal of Applied Chemistry (IOSR-JAC) e-issn: 2278-5736. Volume 6, Issue 5 (Jan. 2014), PP 61-65 Uranium Concentrations measurement for Ground Water and Soil Samples in Al-Najaf/Iraq Ali A. Abojassim
More informationSeaborg s Plutonium?
Seaborg s Plutonium? Eric B. Norman, Keenan J. Thomas, Kristina E. Telhami* Department of Nuclear Engineering University of California Berkeley, CA 94720 Abstract Passive x-ray and gamma ray analysis was
More informationShielded Scintillator for Neutron Characterization
Shielded Scintillator for Neutron Characterization A Thesis Submitted in Partial Fulfillment of the Requirements for Graduation with Research Distinction in Engineering Physics By Patrick X. Belancourt
More informationTITLE: Air Kerma Primary Standard: Experimental and Simulation Studies on Cs-137
TITLE: Air Kerma Primary Standard: Experimental and Simulation Studies on Cs-137 AUTHORS: J. Cardoso, L. Santos, C. Oliveira ADRESS: Instituto Tecnológico e Nuclear Estrada Nacional 10; 2686-953 Sacavém;
More informationPart 12- Physics Paper 1 Atomic Structure Knowledge Questions
Part 12- Physics Paper 1 Atomic Structure Knowledge Questions Internal energy and energy transfers Internal energy and energy transfers Changes of state and the particle model Particle Model of Matter
More informationBLOOD BIOCHEMISTRY EVALUATION IN HORSES HYPERIMMUNE SERA PRODUCTION
2007 International Nuclear Atlantic Conference - INAC 2007 Santos, SP, Brazil, September 30 to October 5, 2007 ASSOCIAÇÃO BRASILEIRA DE ENERGIA NUCLEAR - ABEN ISBN: 978-85-99141-02-1 BLOOD BIOCHEMISTRY
More informationExperiment Radioactive Decay of 220 Rn and 232 Th Physics 2150 Experiment No. 10 University of Colorado
Experiment 10 1 Introduction Radioactive Decay of 220 Rn and 232 Th Physics 2150 Experiment No. 10 University of Colorado Some radioactive isotopes formed billions of years ago have half- lives so long
More informationTHE USE OF WAVEFORM DIGITIZERS WITH SOLID STATE DETECTORS FOR SPECTROSCOPIC APPLICATIONS. Carly Jean Smith
THE USE OF WAVEFORM DIGITIZERS WITH SOLID STATE DETECTORS FOR SPECTROSCOPIC APPLICATIONS by Carly Jean Smith A senior thesis submitted to the faculty of Brigham Young University in partial fulfillment
More informationProduction of Fluorine-18 by Small Research Reactor
Journal of NUCLEAR SCIENCE and TECHNOLOGY, 4[4], p.185~189 (April 1967). 185 Production of Fluorine-18 by Small Research Reactor Yoshiaki MARUYAMA* Received October 4, 1966 High purity 18F was prepared
More informationMETHOD 9210 POTENTIOMETRIC DETERMINATION OF NITRATE IN AQUEOUS SAMPLES WITH ION-SELECTIVE ELECTRODE
METHOD 9210 POTENTIOMETRIC DETERMINATION OF NITRATE IN AQUEOUS SAMPLES WITH ION-SELECTIVE ELECTRODE 1.0 SCOPE AND APPLICATION 1.1 This method can be used for measuring total solubilized nitrate in drinking
More informationNeutron Spectrometry Using a 7 Li Enriched CLYC Scintillation Detector
Neutron Spectrometry Using a 7 Li Enriched CLYC Scintillation Detector Alexander Luke Miller, Rachid Machrafi, Nafisah Khan Faculty of Energy Systems and Nuclear Engineering, University of Ontario Institute
More informationPerfluorinated Alkyl Acids (PFAA) in Water by LC/MS/MS - PBM
Organics Revision Date: July 19, 2017 Perfluorinated Alkyl Acids (PFAA) in Water by LC/MS/MS - PBM Parameter Perfluorinated Alkyl Acids (Perfluorobutane Sulphonate (PFBS), Perflourooctane Sulphonate (PFOS),
More informationRICE UNIVERSITY GAMMA-RAY SPECTRA FROM BE 3 AND N 1^ WITH C 12. Hsin-Min Kuan A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE
RICE UNIVERSITY GAMMA-RAY SPECTRA FROM BE 3 REACTIONS WITH C 12 AND N 1^ by Hsin-Min Kuan A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF ARTS Houston, Texas April
More informationDistinguishing fissions of 232 Th, 237 Np and 238 U with beta-delayed gamma rays
Distinguishing fissions of 232, 237 and 238 with beta-delayed gamma rays A. Iyengar 1, E.B. Norman 1, C. Howard 1, C. Angell 1, A. Kaplan 1, J. J. Ressler 2, P. Chodash 1, E. Swanberg 1, A. Czeszumska
More informationThe detector and counter are used in an experiment to show that a radioactive source gives out alpha and beta radiation only.
ATOMS AND NUCLEAR RADIATION PART II Q1. The detector and counter are used in an experiment to show that a radioactive source gives out alpha and beta radiation only. Two different types of absorber are
More informationDirect measurement of the 17 O(p,α) 14 N reaction at energies of astrophysical interest at LUNA
Direct measurement of the 17 O(p,α) 14 N reaction at energies of astrophysical interest at LUNA SUPA, School of Physics and Astronomy, the University of Edinburgh E-mail: carlo.bruno@ed.ac.uk LUNA collaboration
More informationPhotofission of 238-U Nuclei
Photofission of 238-U Nuclei International Thorium Energy Conference - ThEC18, 29-31st of October 2018, Belgium İsmail Boztosun This research has been supported by TÜBİTAK with grant number 114F220 Motivations
More informationMass Yield Distribution in the Photon-induced Fission of 232 Th, 238 U, nat Pb, and 209 Bi
Mass Yield Distribution in the Photon-induced Fission of 232 Th, 238 U, nat Pb, and 209 Bi H. Naik 1, G.N. Kim 2*, V.T. Nimje 3, K.C. Mittal 3, M.W. Lee 2, K. Kim 2, A. Goswami 1, M.-H. Cho 4 1 Radiochemistry
More informationIsotopes Atoms of an element (same # p+) that differ in their number of neutrons
Isotopes Atoms of an element (same # p+) that differ in their number of neutrons Radio-isotopes Isotope of an element that is UNSTABLE. They spontaneously emit particles (energy) in order to achieve a
More informationMeasurement of induced radioactivity in air and water for medical accelerators
Measurement of induced radioactivity in air and water for medical accelerators K. Masumoto 1, K. Takahashi 1, H. Nakamura 1, A. Toyoda 1, K. Iijima 1, K. Kosako 2, K. Oishi 2, F. Nobuhara 1 High Energy
More informationA Comparison between Channel Selections in Heavy Ion Reactions
Brazilian Journal of Physics, vol. 39, no. 1, March, 2009 55 A Comparison between Channel Selections in Heavy Ion Reactions S. Mohammadi Physics Department, Payame Noor University, Mashad 91735, IRAN (Received
More informationCross-section Measurements of Relativistic Deuteron Reactions on Copper by Activation Method
Nuclear Physics Institute, Academy of Sciences of the Czech Republic Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague Cross-section
More informationArjan Plompen. Measurements of sodium inelastic scattering and deuterium elastic scattering
Arjan Plompen Measurements of sodium inelastic scattering and deuterium elastic scattering Overview Na inelastic scattering with GAINS C. Rouki et al., Nucl. Instrum. Meth. A 672 (2012) 82 Na elastic and
More informationISOCS / LabSOCS. Calibration software for Gamma Spectroscopy
ISOCS / LabSOCS Calibration software for Gamma Spectroscopy Counts Setup Hardware Peak Shaping Parameters Rise Time Flat Top Pole-zero Number of Channels Signal Gain Setting up a detector for measurement
More informationNuclear Reactions A Z. Radioactivity, Spontaneous Decay: Nuclear Reaction, Induced Process: x + X Y + y + Q Q > 0. Exothermic Endothermic
Radioactivity, Spontaneous Decay: Nuclear Reactions A Z 4 P D+ He + Q A 4 Z 2 Q > 0 Nuclear Reaction, Induced Process: x + X Y + y + Q Q = ( m + m m m ) c 2 x X Y y Q > 0 Q < 0 Exothermic Endothermic 2
More informationAlyssa Dibidad Texas A&M University Cyclotron Institute REU. 3 rd year Biochemistry Student Florida A&M University Tallahassee, FL
Alyssa Dibidad Texas A&M University Cyclotron Institute REU 3 rd year Biochemistry Student Florida A&M University Tallahassee, FL What is Chemistry? The Basics The Atom and Atomic Structure Elements and
More informationEXAMINATION QUESTIONS (6)
1. What is a beta-particle? A a helium nucleus B a high-energy electron C four protons D two neutrons EXAMINATION QUESTIONS (6) 2. The diagram shows part of a circuit used to switch street lamps on and
More informationAPPLIED RADIATION PHYSICS
A PRIMER IN APPLIED RADIATION PHYSICS F A SMITH Queen Mary & Westfield College, London fe World Scientific m Singapore * New Jersey London Hong Kong CONTENTS CHAPTER 1 : SOURCES of RADIATION 1.1 Introduction
More informationRadioisotopes and PET
Radioisotopes and PET 1 Radioisotopes Elements are defined by their number of protons, but there is some variation in the number of neutrons. Atoms resulting from this variation are called isotopes. Consider
More informationAvailable online at ScienceDirect. Energy Procedia 71 (2015 ) Yokohama, Kanagawa, Japan
Available online at www.sciencedirect.com ScienceDirect Energy Procedia 71 (21 ) 22 26 The Fourth International Symposium on Innovative Nuclear Energy Systems, INES-4 Design of a proton-induced quasimonochromatic
More informationREMOVAL OF FLUORIDE IN DRINKING WATER BY GREEN CHEMICAL APPROACH
J. Curr. Chem. Pharm. Sc.: 2(1), 2012, 69-75 ISSN 2277-2871 REMOVAL OF FLUORIDE IN DRINKING WATER BY GREEN CHEMICAL APPROACH R. N. YADAV *, RAJDEEP YADAV, NAVIN KUMAR DAGAR, PRIYANKA GUPTA, O. P. SINGH
More informationName: Class: Date: SHORT ANSWER Answer the following questions in the space provided.
CHAPTER 21 REVIEW Nuclear Chemistry SECTION 1 SHORT ANSWER Answer the following questions in the space provided. 1. Based on the information about the three elementary particles in the text, which has
More informationGB Translated English of Chinese Standard: GB NATIONAL STANDARD OF THE
Translated English of Chinese Standard: GB5009.28-2016 www.chinesestandard.net Buy True-PDF Auto-delivery. Sales@ChineseStandard.net NATIONAL STANDARD OF THE GB PEOPLE S REPUBLIC OF CHINA GB 5009.28-2016
More informationChapter. Nuclear Chemistry
Chapter Nuclear Chemistry Nuclear Reactions 01 Chapter 22 Slide 2 Chapter 22 Slide 3 Alpha Decay: Loss of an α-particle (a helium nucleus) 4 2 He 238 92 U 234 4 U He 90 + 2 Chapter 22 Slide 4 Beta Decay:
More informationUse of Gamma Rays from the Decay of 13.8-sec "Be to Calibrate a Germanium Gamma Ray Detector for Measurements up to 8 MeV
The submitted manuscript has been authored by a contractor of the U S Government under contract No W-31-109-ENG-38 Accordingly the U S Government retains a nonexclusive, royalty-free license to publish
More informationPhysics 107: Ideas of Modern Physics
Physics 107: Ideas of Modern Physics Exam 3 Apr. 19, 2006 Name ID # Section # On the Scantron sheet, 1) Fill in your name 2) Fill in your student ID # (not your social security #) 3) Fill in your section
More informationPhysics 107: Ideas of Modern Physics
Physics 107: Ideas of Modern Physics Exam 3 Apr. 19, 2006 Name ID # Section # On the Scantron sheet, 1) Fill in your name 2) Fill in your student ID # (not your social security #) 3) Fill in your section
More informationIAP NAN of Ukraine activity in. Possible areas of cooperation in. Roman Kholodov, PICS Meeting, Basivka, Ukraine,
1 IAP NAN of Ukraine activity in field of High Energy Physics. Possible areas of cooperation in frame of PICS and beyond. Institute of Applied Physics National Academy of Sciences of Ukraine 2 The Institute
More informationNUCLEAR ENERGY! DAY 1: (RADIATION, FISSION, FUSION)
NUCLEAR ENERGY! DAY 1: (RADIATION, FISSION, FUSION) Nucleus Stability Stability of the nucleus depends on the nuclear forces that act between protons and neutrons Protons repel each other Protons attract
More informationThe table shows the average background radiation dose from various sources that a person living in Britain receives in one year.
## The table shows the average background radiation dose from various sources that a person living in Britain receives in one year. Source of background radiation Average amount each year in dose units
More informationRadiation and Radioactivity. PHYS 0219 Radiation and Radioactivity
Radiation and Radioactivity 1 Radiation and Radioactivity This experiment has four parts: 1. Counting Statistics 2. Gamma (g) Ray Absorption Half-length and shielding 3. 137 Ba Decay Half-life 4. Dosimetry
More informationApplication of total reflection X-ray fluorescence spectrometry for trace elemental analysis of rainwater
PRAMANA c Indian Academy of Sciences Vol. 76, No. 2 journal of February 2011 physics pp. 361 366 Application of total reflection X-ray fluorescence spectrometry for trace elemental analysis of rainwater
More informationNeutron capture cross sections on light nuclei
Mem. S.A.It. Vol. 77, 922 c SAIt 2006 Memorie della Neutron capture cross sections on light nuclei M. Heil, F. Käppeler, and E. Uberseder Forschungszentrum Karlsruhe, Institut für Kernphysik, Postfach
More informationThere are no stable isotopes of elements above atomic number 83.
Nuclear Chemistry Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some are unstable and spontaneously decay, emitting radiation. All
More informationEEE4106Z Radiation Interactions & Detection
EEE4106Z Radiation Interactions & Detection 2. Radiation Detection Dr. Steve Peterson 5.14 RW James Department of Physics University of Cape Town steve.peterson@uct.ac.za May 06, 2015 EEE4106Z :: Radiation
More informationApplication field / Industry branch:
Application field / Industry branch: Chemistry / Polymer Industry Electronics Energy Nutrition / Agriculture Geology / Mining Semiconductor Technology Clinical Chemistry / Medicine / Sanitation / Health
More informationSimulation of Cross Section for the Production of Copper-67
e-issn:3-459 p-issn:347-36 Simulation of Cross Section for the Production of Copper-67 dusei G *, Andam AB, Banini GK, Fletcher JJ and Tandoh J Graduate School of Nuclear and Allied Sciences, University
More informationSAVE PAPER AND INK!!!
SAVE PAPER AND INK!!! When you print out the notes on PowerPoint, print "Handouts" instead of "Slides" in the print setup. Also, turn off the backgrounds (Tools>Options>Print>UNcheck "Background Printing")!
More informationSome nuclei are unstable Become stable by ejecting excess energy and often a particle in the process Types of radiation particle - particle
Radioactivity George Starkschall, Ph.D. Lecture Objectives Identify methods for making radioactive isotopes Recognize the various types of radioactive decay Interpret an energy level diagram for radioactive
More informationRadioactivity III: Measurement of Half Life.
PHY 192 Half Life Spring 2010 1 Radioactivity III: Measurement of Half Life. Introduction This experiment will once again use the apparatus of the first experiment, this time to measure radiation intensity
More informationGamma ray coincidence and angular correlation
University of Cape Town Department of Physics Course III laboratory Gamma ray coincidence and angular correlation Introduction Medical imaging based on positron emission tomography (PET) continues to have
More information