19:00 21:30 Registration and reception at Hotel ETAP Altinel. Welcome

Size: px

Start display at page:

Download "19:00 21:30 Registration and reception at Hotel ETAP Altinel. Welcome"

Reynard George
5 years ago
Views:

AGENDA FOR 5th VERMI YOUNG RESEARCHERS WORKSHOP ON STANDARDISATION OF S in the frame of IPA Turkey* 1 6 November 2009, TAEK, Ankara, Turkey Sunday, 1 November 2009 19:00 21:30 Registration and

15 General metrology structure in radionuclide metrology Mike Woods MRA, BIPM, CCRI(II), EURAMET, RMOs KCDB Appendix B (Key comparisons) SIR, CCRI(II), RMO comparisons, KCRV KCDB Appendix C (CMCs)

30 standardization techniques Philippe Cassette Liquid Scintillation techniques: CIEMAT/NIST, TDCR 12.00 Stefaan Pommé Defined Solid Angle techniques 12.20 12.

45 Tea 4πβ-γ-coincidence counting simple overview including extrapolation and tracer efficiency technique Overview of generic groupings principle and uncertainties tables Exercise 1 Present

1 AGENDA FOR 5th VERMI YOUNG RESEARCHERS WORKSHOP ON STANDARDISATION OF S in the frame of IPA Turkey* 1 6 November 2009, TAEK, Ankara, Turkey Sunday, 1 November :00 21:30 Registration and reception at Hotel ETAP Altinel Monday, 2 November 2009 Primary standardisation, nuclear data Introduction İbrahim Tükenmez (TAEK), Uwe Wätjen Welcome Organisational issues General metrology structure in radionuclide metrology Mike Woods MRA, BIPM, CCRI(II), EURAMET, RMOs KCDB Appendix B (Key comparisons) SIR, CCRI(II), RMO comparisons, KCRV KCDB Appendix C (CMCs) Definition of a primary method Discussion Coffee Brief overview of primary Stefaan Pommé Overview of primary techniques 4π counting techniques (α, β, γ) standardization techniques Philippe Cassette Liquid Scintillation techniques: CIEMAT/NIST, TDCR Stefaan Pommé Defined Solid Angle techniques General metrology issue Stefaan Pommé Mike Woods Exercises Woods, Bé and Pommé Tea 4πβ-γ-coincidence counting simple overview including extrapolation and tracer efficiency technique Overview of generic groupings principle and uncertainties tables Exercise 1 Present participants with X (10 to 20) nuclides and their pictorial decay schemes. Identify any special problems (e.g. pure beta, delayed state, mixture of EC-gamma and beta-gamma) and select appropriate primary measurement methods. Use cases from above! Nuclear Data Marie-Martine Bé Sources of data (include DDEP and IAEA-CRPs) Summary of evaluation techniques and highlight pitfalls of superficial acceptance of data Example of Table de Radionucléides pages and their interpretation Evaluation of discrepant data sets Close Marie-Martine Bé and Stefaan Pommé Examples of evaluations - for branching ratios, - for half-lives * Project TR "Improving Chemical and Ionising Radiation Metrology" Tel.: +32-(0) Fax: +32-(0) /6

2 Tuesday, 3 November 2009 Gamma-ray spectrometry Gamma Dirk Arnold spectrometry Features of a gamma ray spectrum: photopeak, Compton continuum and Compton edge, escape peaks, sum peaks, backscatter peak. Short exercise to identify these features in a spectrum of 24 Na Detectors Mikael Hult Properties and choice of detectors Peak processing Mikael Hult Peak finding, continuum, peak area; Energy calibration; Efficiency calibration and fundamental equation (A = C/t.P γ.ε) Short exercise Coffee Summing Dirk Arnold Random summing; Coincidence summing; Software packages Background in gammaspectrometry Low-level applications Dirk Arnold Mikael Hult Mikael Hult Background caused by NORM; Ra and Rn and isotopes; Man-made background radioisotopes ( 137 Cs); Detection limits and reporting Exercise Hult Short exercise on background and detection limits Exercises Arnold, Hult, Bé Tea Exercise 2 Calculation of activity. Determination of overall measurement efficiency from a complex decay scheme which contains multiple cascades using given energy-efficiency curves and decay scheme data, pictorial and tabular Applications Dirk Arnold Environmental analysis: self-absorption problems; Compton suppression Monte-Carlo Dirk Arnold Overview and preparation for exercise 3 modelling Exercises Arnold, Hult Exercise 3 Using MC simulation software on PCs, exercise with Ge-Specor; Effect of different detector sizes, sample geometries; True coincidence summing Close Exercise 3 can be taken up again on the following days Tel.: +32-(0) Fax: +32-(0) /6

3 Wednesday, 4 November 2009 Statistics and uncertainty, Laboratory visit Statistics Stefaan Pommé Uncertainties Mike Woods Stress GUM and adhere to its terminology: means, standard deviation and standard uncertainty, propagation, influence coefficient, coverage factor, combined standard and expanded uncertainty, etc Exercises Pommé, Woods Exercise 4 Uncertainty estimations and rounding of numbers Coffee Exercises Arnold, Hult, Wätjen Transfer to at Laboratory visit to Tea all Exercise 5 Calculation of activity including complete uncertainty budget for gamma-ray spectrometry Determine measurement uncertainty for a typical applied gamma-spec measurement (air filter) Visit and discussion with staff Laboratory visit to (continued) Break Workshop dinner Close all Visit and discussion with staff Transfer to hotel and break Tel.: +32-(0) Fax: +32-(0) /6

4 Thursday, 5 November 2009 Liquid scintillation, α-spectrometry, quality assurance Liquid scintillation counting (not TDCR) Philippe Cassette, Karsten Kossert Mechanisms of detection, Cocktails (differences) Quenching Time-dependent stability Phase separation e.g. 3 H in one phase, nuclide in other Software Uncertainties Precautions for source preparation Special considerations for environmental analysis Coffee Exercises Cassette, Kossert Exercise 6 From spectrum, estimate ratios of activities; then from known efficiencies and total count rate, determine the individual activities Cherenkov counting α-particle spectrometry Tea Karsten Kossert Uwe Wätjen α-particle interaction with matter, detector properties, features of an α-particle spectrum, source preparation Quality Assurance Mike Woods ISO17025 Quality control, validation versus verification Audits Validations of methods, software, etc Comparisons, Training, Records Exercises Woods Exercise 7 Develop QC schedule for maintaining and monitoring performance of systems in use at TAEK laboratories (1) alpha-particle spectrometer (2) LSC (3) ionisation chamber, radionuclide calibrator (4) Ge γ-ray spectrometer (25 minutes each group) (30 minutes) Close Tel.: +32-(0) Fax: +32-(0) /6

5 Friday, 6 November 2009 Ionisation chambers, interlaboratory comparisons Ionisation chambers Mike Woods Principles of operation Electrometers Recombination Background/seasonal variations Construction of efficiency calibration curves Coffee Radionuclide calibrators Mike Woods Uncertainties, radionuclide calibrators (experiences, comparisons, commercial systems, syringes, etc.) Exercises Woods Exercise 8 (part 1) Determination of a calibration factor from an efficiency curve Exercise 8 (part 2) Determination of an activity from a contaminated sample Electronics and measurement parameters EC measurement comparisons for environmental radioactivity Philippe Cassette Uwe Wätjen Include dead-time effects especially for high count rate sources, live-timers, pulser technique for dead time, two-source method +. - traceability, key comparisons, comparisons with reference values - air filter comparison - milk powder comparison - water comparison Exercises Wätjen Exercise 9 Determine measurement uncertainty for a typical applied radionuclide measurement (U, Ra in water) Tea Exercise continued Desirable developments Workshop closure Close Panel discussion of exercise 9 Necessary developments to establish - a secondary standardisation lab for radioactivity - a primary standardisation lab for radioactivity Discussion Tel.: +32-(0) Fax: +32-(0) /6

6 5th VERMI YOUNG RESEARCHERS WORKSHOP ON STANDARDISATION OF S in the frame of IPA Turkey* 1 6 November 2009 TAEK Headquarters Eskişehir Yolu 9.km Lodumlu Ankara, Turkey * Organised and funded under Project TR "Improving Chemical and Ionising Radiation Metrology" in the frame of the European Union Instrument for Pre-accession Assistance (IPA), National Programme for Turkey under the IPA-Transition Assistance and Institution Building Component for 2008 Tel.: +32-(0) Fax: +32-(0) /6

Fundamentals of Radionuclide Metrology

Fundamentals of Radionuclide Metrology Brian E. Zimmerman, PhD Physical Measurement Laboratory National Institute of Standards and Technology Gaithersburg, MD USA SIM Metrology Workshop Buenos Aires, Argentina