Background by Neutron Activation in GERDA
|
|
- Vivien McGee
- 5 years ago
- Views:
Transcription
1 Background by Neutron Activation in GERDA Georg Meierhofer people involved: Kepler Center for Astro and Particle Physics University Tübingen P. Grabmayr J. Jochum P. Kudejova L. Canella J. Jolie IKP, Universität zu Köln
2 Outline Motivated by Neutrinoless double beta decay experiments GERDA) Neutron capture and decay processes on Ge Background by neutron capture on Ge Measurements with cold FRM II Cross section of the 74Ge(n,γ) and Ge(n,γ) reactions Prompt γ-ray spectrum in 75Ge and Ge Summary
3 Double beta decay Double beta decay (2νββ) can be observed if single beta decay is energetically forbidden, but the transition of two neutrons into two protons (or pp -> nn) is allowed. The nucleus emits two electrons (positrons) and two anti-neutrinos (neutrinos). (2νββ ) 2νββ was observed in 11 isotopes: 48Ca, Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te, 150 Nd, 238U, 130Ba (β+β+) Zn βga 31 EC A= 30 β- EC As 33 Ge 32 β-β- β- EC Br Rb 37 Kr Se 34
4 GERDA: The GERmanium Detector Array + Isotope: Ge (Qββ = 2039 kev) Phase I: ~18 kg of Ge Phase II: ~40 kg of Ge + Location: LNGS, Gran Sasso, Italy + + Design: Bare HPGe detectors (~86% Ge) submerged into LAr. LAr acts as cooling liquid and γ-ray shield. Cerenkov muon veto (water tank with Ø=10 m) no high Z-materials used, 3400 m.w.e. of rock to shield cosmic radiation
5 Background in GERDA Radiopurity of: Germanium detector (cosmogenic 68Ge) Germanium detector (cosmogenic 60Co) Germanium detector (bulk) Germanium detector (surface) Cabling Copper holder Electronics Cryogenic liquid Infrastructure Background level on ROI < 10-2 cts/(kev kg y) (Phase I) < 10-3 cts/(kev kg y) (Phase II) Sources: Natural activity of rock Muons and neutrons
6 Background in GERDA Radiopurity of: Germanium detector (cosmogenic 68Ge) Germanium detector (cosmogenic 60Co) Germanium detector (bulk) Germanium detector (surface) Cabling Copper holder Electronics Cryogenic liquid Infrastructure Sources: Natural activitybyofcosmic rock muons can propagate through the water tank and LAr to the Ge-diodes. neutrons produced Muons and neutrons
7 Neutron Capture by Ge /2+ after neutron capture LNGS: 1 muon/(m h) MC-simulations: ~1 n-capture/(kg y) 2 E (kev) 1/2- IT 7/2+ Jπ Ge β- Limit from previous experiments: max. 6 0νββ-counts in phase I Half-life times m Ge: t1/2 = 52.9 s Ge: t1/2 = 11.3 h 215 3/2- unstable, 0 decay 3/2- to Se E (kev) Jπ As
8 Neutron Capture by Ge /2+ after neutron capture prompt γ-cascade Emax = 5911 kev E (kev) 1/2- IT 7/2+ Jπ Ge β- Half-life times m Ge: t1/2 = 52.9 s Ge: t1/2 = 11.3 h 215 3/2-0 3/2- E (kev) Jπ As
9 Neutron Capture by Ge /2+ after neutron capture prompt γ-cascade Emax = 5911 kev E (kev) delayed β-spectrum 1/2- IT 7/2+ Jπ Emax = 2862 kev continouos, mimics 0νββ signal Half-life times m Ge: t1/2 = 52.9 s Ge: t1/2 = 11.3 h Ge β /2-0 3/2- E (kev) Jπ As
10 Neutron Capture by Ge /2+ after neutron capture prompt γ-cascade Emax = 5911 kev E (kev) delayed β-spectrum 1/2- IT 7/2+ Jπ Emax = 2862 kev continouos, mimics 0νββ signal Ge β- delayed γ-rays Emax = 2353 kev Half-life times m Ge: t1/2 = 52.9 s Ge: t1/2 = 11.3 h 215 3/2-0 3/2- E (kev) Jπ As
11 Neutron Capture by Ge /2+ after neutron capture prompt γ-cascade Emax = 5911 kev delayed β-spectrum E (kev) 1/2- IT 7/2+ Jπ Ge Emax = 2862 kev 34% of all activated continouos, mimics 0νββ signal β- nuclei decay from the isomeric s delayed γ-rays Emax = 2353 kev 215 Background by β-particles from decay of mge: 2.1 x 10-4 counts/kev/decay 0 E (kev) Required background level Phase II: 10 counts/(kev kg y) -3 3/23/2Jπ As
12 Prompt transitions in Ge 6072 kev not in decay scheme 2064 kev 1880 kev 1248 kev 1021 kev E [kev] IAEA Nuclear Data Services E [kev] kev kev 0 kev Only 15% of the emitted energy known Nuclear Data Sheets 81
13 FRM II (Prompt Gamma-ray Activation Analysis) Beam ~3 x 109 nth/(cm2 s1) <λn> = 6.7 Å (cold) <En> = 1.83 mev Detectors 2 HPGe with Compton suppresion Li/Cd/Pb shielding
14 Thermal n-capture cross section β-decay were measured by HPGe detectors. The cross-section was calculated relative to 198Au using k HPGedetector Compton suppression Compton suppressio lead lead decay spectrum of Ge GeO2 target enriched inge + Au foil neutron beam 0 decay gammas Ge target Au foil
15 Thermal n-capture cross section /2+ β-decay were measured by HPGe detectors. The cross-section was calculated relative to 198Au using k 159 1/2-0 E (kev) 7/2+ Jπ isomeric state β-decay: 81(2)% IT: 19(2)% IT Ge βdecay spectrum of Ge σ Ge λ = AGe I Au,γ n Au r Φ r A Au I Ge,γ nge r Φ r Au σ 0,Ge = 0 AGe I Au,γ n Au A Au I Ge,γ nge 0, Au /2-0 E (kev) 3/2Jπ 215 As
16 Results Ge(n,γ) cross section [mbarn] σ(ge total) Seren (1947): 85 ±17 Pomerance (1952): 350 ± 70 Brooksbank (1955): 300 ± 60 Metosian (1957): ± 15 Lyon (1957): 43 ± 2 New value (2009): 68.8 ± 3.4 σ(ge direct) Lyon (1957): 6 ± ± 4.7 σ(mge) Metosian Lyon Wigmann Mannhart (1957): 87 ± 15 (1957): 137 ± 15 (1962): 120 ± 20 (1968): 86 ± ± 16 G. Meierhofer et al., EPJA 40, 61 (2009) relativly large uncertainties due to branching ratio
17 Results 74Ge(n,γ) cross section [mbarn] σ(75ge total) σ(75ge direct) σ(75mge) Seren (1947): 380 ± Pomerance (1952): 600 ± 60 Metosian (1957): 180 ± 40 Lyon Metosian (1957): 40 ± 8 (1960): 550 ± 55 Wigmann (1962): 200 ± 20 Mannhart (1968): 143 ± 16 Koester (1987): 400 ± 200 New value (2010): 497 ± ± ± 5.6 G. Meierhofer et al., PRC 81, 0203 (2010) relativly large uncertainties due to emission probabilities
18 Prompt γ-spectra (preliminary) Enriched: Ge 74 Ge 73 Ge (Ge (decay 75 Ge (decay) Depleted: 74 Ge 73 Ge 72 Ge 70 Ge 75 Ge (decay) Background: F, H, N, Na, C,Cd, Al, Pb t(measurement)= s Further spectra: Empty target (C2F4) Decay (enriched) Decay (depleted)
19 CS Coincidence m ~ 300 mg of enriched GeO2 Irradiation time 8 d HPGedetector Lead shielding CS Lead shielding Δt between detectors prompt gammas Neutron beam Ge Target FWHM=20ns prompt gammas Lead shielding Lead shielding t CS HPGe-detector Time difference is used to distinguish between random and true coincidences.
20 Example 5049 kev Ge Background detector A detector B
21 Decay scheme in Ge (preliminary) In total 122 transitions assigned to Ge, 75 of them placed in the decay scheme. Some transitions known from other reactions: new transitions -β-decay of Ga - Ge(13C,12C)Ge transitions known from β-dec Now 60% of the emitted energy known
22 Summary Neutron capture on Ge will produce background in GERDA (prompt cascade and delayed decay of Ge). The prompt cascade has to be well known to veto the delayed decay of Ge. The cross sections of the Ge(n,γ) and 74Ge(n,γ) reactions were measured by the activation method. Values of higher reliability obtained The prompt gamma-ray spectrum in Ge and 75Ge were measured and the level schemes reconstructed. about 60% of emitted energy found Data will be used for further MC-simulations
23 Energy weighted intensities v= Iγ * Eγ Itotal * Etotal I=100% E=1 I=100% E=0.5 I=100% E=0.5 v=1 v=1
24 Neutron Capture by Ge In GSTR Luciano discussed this problem: Production rate: nuclei/kg/y (LAr) Counts in ROI due to β-particles Ge: 8 x 10-5 counts/kev/decay (can be reduced by factor of 3 by anti-coincidence). m Ge: 2.1 x 10-4 counts/kev/decay (small reduction due to direct transition to ground state). 1. Rejection strategy for β-particles from mge: t1/2(mge)=52.9s dead time 4min (εdec = 0.96) Trigger on muon veto (rate: 2.5 per min.). 2. not feasible Trigger on muon veto & prompt gamma-rays (after neutron capture) in HPGe (9 events/day). favoured 5. ε = εmv x εge x εdec 6. ε = 0.95 x 0.56 x 0.96 = 0.51
25 Neutron Capture by 74Ge after neutron capture Sn = 6505 kev Emax(β delayed) = 11 kev Emax(γ delayed) = 618 kev Half-life times 75m Ge: t1/2 = 47.7 s 75 Ge: t1/2 = h stable
26 Emission probabilities Depending on the transition used, the cross section varies by 15%. NDS 81. The same effect was observed by J. Marganiec, PRC79, (2009). Very likely that the emission probabilities in the literature are not correct.
27 kev Depleted GeO2 70 Ge: % 72 Ge: 30.04% 73 Ge: 8.40 % 74 Ge: % Ge: 0.59 % / single spectrum // SE Enriched GeO2 70 Ge: 0.0 % 72 Ge: 0.03 % 73 Ge: 0.13 % 74 Ge: 12.1 % Ge: 86.9 %
28 kev detector A detector B detector A detector B Coincident with transition 38 kev 74/ single spectrum 74// SE Background: 2029: < 10-3 cts/(kg kev y) 2035: < 10-3 cts/(kg kev y)
29 Decay scheme in 75Ge (preliminary) new transitions transitions known from β-dec
30 FRM II (Prompt Gamma-ray Activation Analysis) Beam ~3 x 109 nth/(cm2 s1) <λn> = 6.7 Å (cold) <En> = 1.83 mev a.u. Detectors 2 HPGe with Compton suppresion Li/Cd/Pb shielding Wave length [λ]
31 Prompt Gamma-ray Activation Analysis metorite HPGedetector CS Lead CS Lead PGAA used for non-destructive determination of elemental/isotopic Neutrons composition. Less sensitive than NAA, but in principle all (also non-radioactive) isotopes (except 4He) can be detected. Lead CS prompt gammas prompt gammas Lead HPGe-detector
32 PGAA/PGAI/NT Other techniques: Prompt Gamma-ray Activation Imaging, Neutron Tomography fibula 6 th(century (replica Sensitivity depends on the cross sections of the isotopes (up to 0.1 ppm). Sensitivity high: B, Cd, Sm, Gd medium: H, Cu, Ag, Au, Na, K, low: C, N, O, Mg, Si, Sn, Pb Mn, Fe, Al, Ti
33 Abundances in depleted GeO2 For detection of Ge PGAA is not competitive because
34 Thermal n-capture cross section β-decay were measured by HPGe detectors. The cross-section was calculated relative to 198Au using k decay spectrum of Ge 0
35 Neutron Capture by Ge In GSTR Luciano discussed this problem: Production rate: nuclei/kg/y (LAr) Counts in ROI due to β-particles Ge: 8 x 10-5 counts/kev/decay (can be reduced by factor of 3 by anti-coincidence). m Ge: 2.1 x 10-4 counts/kev/decay (small reduction due to direct transition to ground state). Rejection strategy for β-particles from mge: t1/2(mge)=52.9s dead time 4min (εdec = 0.96) Trigger on muon veto (rate: 2.5 per min.). 2. not feasible Trigger on muon veto & prompt gamma-rays (after neutron capture) in HPGe (9 events/day). favoured 5. ε = εmv x εge x εdec 6. ε = 0.95 x 0.56 x 0.96 = Trigger on energy deposition of >4 MeV (above natural radioactivity) in HPGe. 9. lower efficiency than strategy 2.
36 Prompt γ-spectrum in Ge aring spectra with different isotopical composition allows to determine unambiguously the transitions in Counts E [kev] (preliminary) Channel
37 Analysis Detector II Detector I Time information
38 Cross Section σ Ge λ = AGe I Au,γ n Au r Φ r A Au I Ge,γ nge r Φ r Au AGe I Au,γ n Au σ 0,Ge = A Au I Ge,γ nge 0, Au
39 Coincidence Detector II Detector I
Neutron Activation of 76Ge
Neutron Activation of 76Ge Georg Meierhofer people involved: P. Grabmayr J. Jochum Kepler Center for Astro and Particle Physics University Tübingen P. Kudejova L. Canella J. Jolie IKP, Universität zu Köln
More informationNeutron Activation of 74 Ge and 76 Ge
Neutron Activation of 74 Ge and 76 Ge people involved: P. Grabmayr J. Jochum Georg Meierhofer P. Kudejova L. Canella J. Jolie IKP, Universität zu Köln Eurograd, Hallstatt 27.09. 29.09.2009 Outline Motivation:
More informationCosmogenic background for the GERDA experiment. Luciano Pandola INFN, Laboratori del Gran Sasso, Italy
Cosmogenic background for the GERDA experiment Luciano Pandola INFN, Laboratori del Gran Sasso, Italy Cosmogenic Activity and Background Workshop, Berkeley April 15 th, 2011 GERDA experiment at LNGS The
More informationHEROICA: a test facility for the characterization of BEGe detectors for the GERDA experiment
Physikalisches Institut Kepler Center for Astro and Particle Physics : a test facility for the characterization of BEGe detectors for the GERDA experiment Raphael Falkenstein for the GERDA collaboration
More informationBackground Free Search for 0 Decay of 76Ge with GERDA
Background Free Search for 0 Decay of 76Ge with GERDA Victoria Wagner for the GERDA collaboration Max-Planck-Institut für Kernphysik Rencontres de Moriond, Electro Weak La Thuile, March 24 2017 The GERDA
More informationGERDA: The GERmanium Detector Array for the search for neutrinoless decays of 76 Ge. Allen Caldwell Max-Planck-Institut für Physik
GERDA: The GERmanium Detector Array for the search for neutrinoless decays of 76 Ge Allen Caldwell Max-Planck-Institut für Physik What we know Mass Scale NORMAL INVERTED m 12 2 known m 13 2 known Mixing
More informationNeutrinoless Double Beta Decay for Particle Physicists
Neutrinoless Double Beta Decay for Particle Physicists GK PhD Presentation Björn Lehnert Institut für Kern- und Teilchenphysik Berlin, 04/10/2011 About this talk Double beta decay: Particle physics implications
More informationThe GERmanium Detector Array
The GERmanium Detector Array n n ν=v p e - e - p Outline: Exp. issues of 0νββ-decay of 76 Ge Concept of GERDA Status of the experiment Summary and conclusions Kevin Kröninger (Max-Planck-Institut für Physik,
More informationTHE CRYOGENIC UNDERGROUND OBSERVATORY FOR RARE EVENTS: STATUS AND PROSPECTS
THE CRYOGENIC UNDERGROUND OBSERVATORY FOR RARE EVENTS: STATUS AND PROSPECTS Eric B. Norman Dept. of Nuclear Engineering Univ. of California, Berkeley, CA U. S. A. Recent results in n physics Neutrinos
More informationGERDA experiment A search for neutrinoless double beta decay. Roberto Santorelli (Physik-Institut der Universität Zürich)
GERDA experiment A search for neutrinoless double beta decay Roberto Santorelli (Physik-Institut der Universität Zürich) on behalf of the GERDA collaboration ÖPG/SPS/ÖGAA meeting 04/09/09 Neutrinos mixing
More informationResults on neutrinoless double beta decay of 76 Ge from the GERDA experiment
EPJ Web of Conferences 95, 04049 (05) DOI:.5/ epjconf/ 059504049 C Owned by the authors, published by EDP Sciences, 05 Results on neutrinoless double beta decay of 76 Ge from the GERDA experiment Dimitrios
More informationTwo Neutrino Double Beta (2νββ) Decays into Excited States
Two Neutrino Double Beta (2νββ) Decays into Excited States International School of Subnuclear Physics 54 th Course: The new physics frontiers in the LHC-2 era Erice, 17/06/2016 Björn Lehnert TU-Dresden,
More informationThe GERDA Experiment:
The GERDA Experiment: a search for neutrinoless double beta decay Max-Planck-Institute for Physics, Munich now at University of Wisconsin, Madison on behalf of the GERDA Collaboration Outline: Motivation
More informationBackground rejection techniques in Germanium 0νββ-decay experiments. ν=v
Background rejection techniques in Germanium 0νββ-decay experiments n p ν=v n eep II. Physikalisches Institut Universität Göttingen Institutsseminar des Inst. für Kern- und Teilchenphysik, Outline Neutrinos
More informationExperimental Searches for Neutrinoless Double-Beta Decays in 76-Ge Alan Poon
Experimental Searches for Neutrinoless Double-Beta Decays in 76-Ge Alan Poon Institute for Nuclear and Particle Astrophysics Nuclear Science Division 1 Outline Introduction - 0νββ decay (see Agostini s
More informationL esperimento GERDA. GERDA - gruppo INFN. L Aquila, Congresso SIF, 30/09/2011. OUTLINE: GERDA Motivations GERDA Status GERDA Future plans
L esperimento GERDA Balata M., Bellotti E., Benato G., Bettini A., Brugnera R., Cattadori C., Garfagnini A., Hemmer S., Iannucci L., Junker M., Laubenstein M., Nisi S., Pandola L., Pullia A., Riboldi S.,
More informationStatus of the GERDA experiment
Status of the GERDA experiment Hardy Simgen Max-Planck-Institute for Nuclear Physics Heidelberg The GERDA experiment Next generation 76 Ge double beta decay experiment at Gran Sasso. Basic idea: Operation
More informationFirst results on neutrinoless double beta decay of 82 Se with CUPID-0
First results on neutrinoless double beta decay of 82 Se with CUPID-0 Lorenzo Pagnanini on behalf of the CUPID-0 collaboration 30 th Rencontres de Blois CUPID: a next generation experiment CUPID (CUORE
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 informationDesign, Construction, Operation, and Simulation of a Radioactivity Assay Chamber
Design, Construction, Operation, and Simulation of a Radioactivity Assay Chamber Wesley Ketchum and Abe Reddy EWI Group, UW REU 2006 Outline Neutrino Physics Background Double Beta Decay and the Majorana
More informationThe Gerda Experiment for the Search of Neutrinoless Double Beta Decay
The Gerda Experiment for the Search of Neutrinoless Double Beta Decay Manuel Walter for the Gerda collaboration Physik-Institut, Universität Zürich, 8057 Zürich, Switzerland DOI: will be assigned The Gerda
More informationNeutron- and muoninduced. underground physics experiments. L. Pandola, V. Tomasello and V. Kudryavtsev. for the JRA1 and N3 simulation groups
Neutron- and muoninduced background in underground physics experiments L. Pandola, V. Tomasello and V. Kudryavtsev for the JRA1 and N3 simulation groups ILIAS 4 th Annual Meeting, Chambery, 2007 ILIAS
More informationApplication of prompt gamma activation analysis with neutron beams for the detection and analysis of nuclear materials in containers
Application of prompt gamma activation analysis with neutron beams for the detection and analysis of nuclear materials in containers Zsolt Révay Institute of Isotopes, Budapest, Hungary Dept. of Nuclear
More informationInvestigation and development of the suppression methods of the 42 K background in LArGe
bb G E R D A Investigation and development of the suppression methods of the 42 K background in LArGe A.V. Lubashevskiy on behalf of GERDA collaboration, Max-Planck-Institut für Kernphysik, Heidelberg.
More informationNew results of CUORICINO on the way to CUORE
New results of CUORICINO on the way to CUORE Laboratori Nazionali del Gran Sasso of INFN On behalf of the CUORE Collaboration The CUORE experiment CUORE (Cryogenic Underground Observatory for Rare Events)
More informationarxiv: v1 [nucl-ex] 20 Dec 2008
Operation of a GERDA Phase I prototype detector in liquid argon and nitrogen M. Barnabé Heider a, A. Bakalyarov b, L. Bezrukov c, C. Cattadori d, O. Chkvorets a, K. Gusev b,e, M. Hult f, I. Kirpichnikov
More informationGERDA & the future of 76 Ge-based experiments
GERDA & the future of 76 Ge-based experiments Matteo Agostini on behalf of the GERDA Collaboration Technische Universität München (TUM), Germany Gran Sasso Science Institute (INFN), L Aquila, Italy 25th
More informationStatus of the CUORE and CUORE-0 experiments at Gran Sasso
Status of the CUORE and CUORE-0 experiments at Gran Sasso S. Di Domizio INFN and University of Genova for the CUORE collaboration Weak Interactions and Neutrinos Natal, September 19 2013 Neutrinoless double
More informationInstitute for Nuclear Research, MSP Kyiv, Ukraine. Dipartimento di Fisica, Università di Roma Tor Vergata, I Rome, Italy
First results of the experiment to search for double beta decay of Cd with CdWO 4 crystal scintillator in coincidence with four crystals HPGe detector V.I. Tretyak a, P. Belli b, R. Bernabei b,c, V.B.
More informationMC Benchmarks for LAr Instrumentation in GERDA
MC Benchmarks for LAr Instrumentation in GERDA Björn Lehnert Institut für Kern- und Teilchenphysik TU-Dresden DPG, Mainz, 22/03/2012 GERDA - GERmanium Detector Array Novel idea: Operate germanium detectors
More informationStatus and Perspectives of the COBRA-Experiment
Status and Perspectives of the COBRA-Experiment Jan Tebrügge for the COBRA Collaboration Status and Perspectives of the COBRA-Experiment Jan Tebrügge beta decays for thedouble COBRA Collaboration CdZnTe
More informationStatus of the CUORE experiment at Gran Sasso
University and INFN Genova ICHEP 2012 MELBOURNE JULY 2012 on behalf of the CUORE collaboration Status of the CUORE experiment at Gran Sasso Double beta decay Rare nuclear decay: (A, Z) (A, Z+2) + 2e- (+2
More informationStatus of the AMoRE experiment searching for neutrinoless double beta decay of 100 Mo
Status of the AMoRE experiment searching for neutrinoless double beta decay of 100 Mo Hyon-Suk Jo Center for Underground Physics Institute for Basic Science INPC 2016 - Adelaide Convention Centre, Australia
More informationCANDLES Experiment Current Status and Future Plan. X. Li for the CANDLES Collaboration
CANDLES Experiment Current Status and Future Plan X. Li for the CANDLES Collaboration 1 Neutrinoless Double Beta Decay (0νββ) 2νββ decay 0νββ decay (A, Z) => (A, Z+2) + 2e - process beyond Standard Model
More informationPROJECT STATUS AND PERSPECTIVES
COBRA CdZnTe 0-NEUTRINO BETA-BETA RESEARCH APPARATUS PROJECT STATUS AND PERSPECTIVES DATE JULY 28, 2011 BY JERRAD MARTIN Agenda Introduction to COBRA Past Results Status of Current R&D PROJECT STATUS AND
More informationReactor On/Off Monitoring with a Prototype of Plastic Anti-neutrino Detector Array (PANDA)
Reactor On/Off Monitoring with a Prototype of Plastic Anti-neutrino Detector Array (PANDA) Yasuhiro Kuroda A, Yo Kato A, Nozomu Tomita A, Ryoko Nakata, Shugo Oguri, Chikara Ito B, Yoshizumi Inoue C, Makoto
More informationDouble Beta Present Activities in Europe
APPEAL Workshop 19-21 February 2007, Japan Double Beta Present Activities in Europe Xavier Sarazin Laboratoire de l Accélérateur Linéaire Orsay France Germanium detector Bolometers CdZnTe semiconductors
More informationNeutrino Masses and Mixing
Neutrino Masses and Mixing < Why so different??? (Harrison, Perkins, Scott 1999) The Mass Puzzle Seesaw mechanism L R m m D m 2 D M m D M m D L R M Heavy Majorana Neutrino Connection with high mass scales
More informationGERDA Meeting, September 2009, LNGS. News from Low-Level-Lab: Attempt to Reduce Neutron Background at Shallow Depths
GERDA Meeting, September 2009, LNGS News from Low-Level-Lab: Attempt to Reduce Neutron Background at Shallow Depths 1. Motivation 1.1 Gamma Spectroscopy at MPI-K Gentner Building Bruno Corrado Low-level-laboratory
More informationNEMO-3 latest results
NEMO-3 latest results Thibaud Le Noblet LAPP On behalf of the NEMO collaboration GdR neutrino 29-30 mai 2017 - APC Outline Neutrinoless double beta decay Tracker-calorimeter technique NEMO-3 detector Latest
More informationStatus of CUORE and Results from CUORICINO. SERGIO DI DOMIZIO UNIVERSITÀ & INFN GENOVA On behalf of the CUORE Collaboration
Status of CUORE and Results from CUORICINO SERGIO DI DOMIZIO UNIVERSITÀ & INFN GENOVA On behalf of the CUORE Collaboration 11th Seminar on Innovative Particle and Radiation Detectors Siena, 1 October 2008
More informationa step forward exploring the inverted hierarchy region of the neutrino mass
a step forward exploring the inverted hierarchy region of the neutrino mass Maria Martinez (U. La Sapienza, Rome) on behalf of the CUPID-0 collaboration 28th Rencontres de Blois, May 29 - June 03 (2016)
More informationSearch for 0νββ-decay with GERDA Phase II
Search for 0νββ-decay with GERDA Phase II (MPI für Physik) for the collaboration GERDA OUTLINE: Phase I background results Phase II data taking Phase II background \wo cuts LAr veto and PSD cuts 0νββ result
More informationSearch for Neutrinoless Double- Beta Decay with CUORE
Search for Neutrinoless Double- Beta Decay with CUORE Kyungeun E. Lim (on behalf of the CUORE collaboration) Jan. 14, 2014, WIDG Seminar, Yale University What we (don t) know about Neutrinos Neutrino Mass
More informationShielding Strategies. Karl Tasso Knöpfle MPI Kernphysik, Heidelberg
Shielding Strategies Karl Tasso Knöpfle MPI Kernphysik, Heidelberg ktkno@mpi-hd.mpg.de Application of Germanium Detector in Fundamental Research Tsinghua University Bejing, March 24-26, 20011 outline Introduction
More informationMeasurement of 39 Ar in Underground Argon for Dark Matter Experiments
Measurement of 39 Ar in Underground Argon for Dark Matter Experiments Jingke Xu Princeton University June 7 th, 2013 1 Evidences for Dark Matter Rotation Curve Gravitational Lensing CMB Power Spectrum
More informationResults on geoneutrinos at Borexino experiment. Heavy Quarks and Leptons Yamagata Davide Basilico
Results on geoneutrinos at Borexino experiment Heavy Quarks and Leptons 2018 - Yamagata Davide Basilico Outline 1. Geoneutrinos 2. Borexino 3. Analysis and results 2 What are geoneutrinos? Distribution
More informationNuclear Chemistry. Decay Reactions The most common form of nuclear decay reactions are the following:
Nuclear Chemistry Nuclear reactions are transmutation of the one element into another. We can describe nuclear reactions in a similar manner as regular chemical reactions using ideas of stoichiometry,
More informationTechnical Specifications and Requirements on Direct detection for Dark Matter Searches
Technical Specifications and Requirements on Direct detection for Dark Matter Searches Jin Li THU/IHEP Symposium of the Sino-German GDT Cooperation 04/08/2013 Tübingen Outline Introduction Direct detection
More informationHow can we search for double beta decay? Carter Hall University of Maryland
How can we search for double beta decay? Carter Hall University of Maryland 1 Neutrinoless Double Beta Decay (ββ0ν) Forbidden if neutrino mass is Dirac only N(Z,A) N(Z+2,A)e - e - e L - 2n W-W- ν R +εν
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 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 informationInvestigation of radiative proton-capture reactions using high-resolution g-ray spectroscopy
Investigation of radiative proton-capture reactions using high-resolution g-ray spectroscopy P. Scholz, F. Heim, J. Mayer, M. Spieker, and A. Zilges Institute for Nuclear Physics, University of Cologne
More informationThe CUORE Detector: New Strategies
The CUORE Detector: New Strategies Chiara Brofferio on behalf of the CUORE collaboration Università di Milano Bicocca Milano Italy INFN Milano Italy The context: Recent developments in ν Physics Oscillation
More informationAtomic Structure and Nuclear Chemistry Multiple Choice Questions PSI Chemistry
Atomic Structure and Nuclear Chemistry Multiple Choice Questions PSI Chemistry Name: 1. What was the first particle discovered inside an atom? A. Proton C. Electron 2. What characteristic of cathode rays
More informationPaolo Agnes Laboratoire APC, Université Paris 7 on behalf of the DarkSide Collaboration. Dark Matter 2016 UCLA 17th - 19th February 2016
Paolo Agnes Laboratoire APC, Université Paris 7 on behalf of the DarkSide Collaboration Dark Matter 2016 UCLA 17th - 19th February 2016 The DarkSide program 2 Double Phase Liquid Argon TPC, a staged approach:
More information-> to worldwide experiments searching for neutrinoless double beta decay
From Baksan to -> A.Smolnikov International Session-Conference of RAS "Physics of fundamental interactions dedicated to 50th anniversary of Baksan Neutrino Observatory, Nalchik, Russia, June 6-8, 2017
More informationProspects for kev-dm searches with the GERDA experiment
Physik-Institut Prospects for kev-dm searches with the GERDA experiment Roman Hiller for the GERDA collaboration 29/03/2017 Page 1 GERDA concept Cleanroom Lock systen Enriched 76 Ge detectors Cryostat
More informationExcited State Transitions in Double Beta Decay: A brief Review
Excited State Transitions in Double Beta Decay: A brief Review Fifteenth International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS15) Dresden 26/08/2014 Björn Lehnert Institut für
More informationStatus of the CUORE and CUORE-0 experiments at Gran Sasso
Status of the CUORE and CUORE-0 experiments at Gran Sasso S. Di Domizio INFN and University of Genova for the CUORE collaboration Les Rencontres de Physique de la Vallée d'aoste La Thuile, February 25
More informationNeutrinos. Why measure them? Why are they difficult to observe?
Outline What is a neutrino? Why do we want to study them? Building a detector to detect the undetectable What does a neutrino detector see? How do you seperate a neutrino signal from the background? Neutrinos
More informationChapter 30 Questions 8. Quoting from section 30-3, K radioactivity was found in every case to be unaffected
Physics 111 Fall 007 Homework Solutions Week #10 Giancoli Chapter 30 Chapter 30 Questions 8. Quoting from section 30-3, K radioactivity was found in every case to be unaffected by the strongest physical
More informationSetup for an in-situ measurement of the total light extinction of Liquid Argon in GERDA
Setup for an in-situ measurement of the total light extinction of Liquid Argon in GERDA Birgit Schneider Technische Universität Dresden Institut für Kern- und Teilchenphysik DPG-Frühjahrstagung Mainz 25th
More informationLow Background Experiments and Material Assay. Tessa Johnson NSSC Summer School July 2016
Low Background Experiments and Material Assay Tessa Johnson NSSC Summer School July 2016 Outline How do we detect particles? Some interesting questions relating to particle physics How can particle detection
More informationSearch for Low Energy Events with CUORE-0 and CUORE
Search for Low Energy Events with CUORE-0 and CUORE Kyungeun E. Lim (on behalf of the CUORE collaboration) Oct. 30. 015, APS Division of Nuclear Physics meeting, Santa Fe, NM The CUORE Experiment CUORE
More informationContents. General Introduction Low background activities Pixel activities Summary and Outlook. Kai Zuber
Contents General Introduction Low background activities Pixel activities Summary and Outlook COBRA Use large amount of CdZnTe Semiconductor Detectors Large array of CdZnTe detectors K. Zuber, Phys. Lett.
More informationInformation Nuclide = is an atomic species characterized by the specific constitution of its nucleus (protons and neutrons) Neutron
NAME: DUE DATE: JULY nd AP Chemistry SUMMER REV: Balancing Nuclear Reactions Why? Nuclear reactions are going on all around us in the form of transmutation, fission and fusion. Using correctly balanced
More informationScience 10. Unit 4:Physics. Block: Name: Book 3: radioactivty
Science 10 Unit 4:Physics Book 3: radioactivty Name: Block: 1 5.1 : Radioactivity & Nuclear Equations Isotopes are versions of an element with the same but Because the number of protons is the same for,
More informationBackground Characterization and Rejection in the LZ Detector. David Malling Brown University IDM 2012 July 25, 2012
Background Characterization and Rejection in the LZ Detector David Malling Brown University IDM 2012 July 25, 2012 LZ Construction 2 Background Sources Ti cryostats 1500 kg
More informationThe GERDA Phase II detector assembly
The GERDA Phase II detector assembly Tobias Bode 1, Carla Cattadori 2, Konstantin Gusev 1, Stefano Riboldi 2, Stefan Schönert 1, Bernhard Schwingenheuer 3 und Viktoria Wagner 3 for the GERDA collaboration
More informationActivation Analysis. Characteristic decay mechanisms, α, β, γ Activity A reveals the abundance N:
2.5. Isotope analysis and neutron activation techniques The previously discussed techniques of material analysis are mainly based on the characteristic atomic structure of the elements and the associated
More informationIntroduction to Environmental Measurement Techniques Radioactivity. Dana Pittauer 1of 48
Introduction to Environmental Measurement Techniques 2016 Radioactivity Dana Pittauer (dpittauer@marum.de) 1of 48 Introduction Radioisotopes are of interest in environmental physics for several reasons:
More informationPrompt γ-rays from Neutron Inelastic
Prompt γ-rays from Neutron Inelastic Scattering at FaNGaS: Benchmark Spectrum Analysis T.H. Randriamalala, M. Rossbach Institute of Energy and Climate Research, Nuclear Waste Management and Reactor Safety,
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 informationResults from GERDA Phase I and status of the upgrade to Phase II. Stefan Schönert (TU München) on behalf of the GERDA collabora;on
Results from GERDA Phase I and status of the upgrade to Phase II Stefan Schönert (TU München) on behalf of the GERDA collabora;on 1 The GERDA experiment @ LNGS plasac µ- veto clean room with lock and glove
More informationNuclear Chemistry Notes
Nuclear Chemistry Notes Definitions Nucleons: Subatomic particles in the nucleus : protons and neutrons Radionuclides: Radioactive nuclei. Unstable nuclei that spontaneously emit particles and electromagnetic
More informationAn active-shield method for the reduction of surface contamination in CUORE
An active-shield method for the reduction of surface contamination in CUORE Marisa Pedretti on behalf of CUORE Collaboration INFN - Milano Università degli Studi dell Insubria Outline of the talk Introduction
More informationBackground Neutron Studies for Coherent Elastic Neutrino-Nucleus Scattering Measurements at the SNS
Background Neutron Studies for Coherent Elastic Neutrino-Nucleus Scattering Measurements at the SNS D. Markoff (NC Central University, Triangle Universities Nuclear Laboratory) For the COHERENT Collaboration
More informationDavid Reyna Belkis Cabrera-Palmer AAP2010, Japan
David Reyna Belkis Cabrera-Palmer AAP2010, Japan Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy s National Nuclear
More informationThe search for neutrino-less double beta decay with LNGS: status and perspectives
The search for neutrino-less double beta decay with GERDA @ LNGS: status and perspectives Stefan Schönert Physik Department, TUM On behalf of the GERDA collaboration Astroteilchenphysik in Deutschland,
More informationBackground Studies for the XENON100 Experiment. Alexander Kish Physics Institute, University of Zürich Doktorandenseminar August 30, 2010 UZH
Background Studies for the XENON100 Experiment Alexander Kish Physics Institute, University of Zürich Doktorandenseminar August 30, 2010 UZH The XENON dark matter search program Target Volume 62 kg Total
More informationSOURCES of RADIOACTIVITY
Section 9: SOURCES of RADIOACTIVITY This section briefly describes various sources of radioactive nuclei, both naturally occurring and those produced artificially (man-made) in, for example, reactors or
More informationNeutron flux measurement using fast-neutron activation of 12 B and 12 N isotopes in hydrocarbonate scintillators
Neutron flux measurement using fast-neutron activation of 12 B and 12 N isotopes in hydrocarbonate scintillators M. M. Boliev E-mail: kchkrv@rambler.ru Yu. F. Novoseltsev R. V. Novoseltseva V. B. Petkov
More informationPhase II upgrade of the Gerda experiment for the search of neutrinoless double beta decay
Available online at www.sciencedirect.com ScienceDirect Physics Procedia 61 (2015 ) 254 259 Phase II upgrade of the Gerda experiment for the search of neutrinoless double beta decay B. Majorovits for the
More informationStudies of the XENON100 Electromagnetic Background
Studies of the XENON100 Electromagnetic Background Daniel Mayani Physik-Institut University of Zurich PhD Seminar PSI, August 26-27, 2015 Searching for elusive particles The main challenge for experiments
More informationChapter 3: Neutron Activation and Isotope Analysis
Chapter 3: Neutron Activation and Isotope Analysis 3.1. Neutron Activation Techniques 3.2. Neutron Activation of Paintings 3.3. From Qumran to Napoleon 3.4. Neutron Activation with Accelerators 3.5. Isotope
More informationAlpha Particle: or Beta Particle: or Neutron: or n 0. Positron: Proton: or p + Gamma Ray:
Key Worksheet 21 Nuclear Chemistry Objectives To be able to write and use a nuclear chemical equation. To be able to predict the missing reactants or products in a nuclear chemical reaction. To be able
More informationNeutrinoless Double Beta Decay. Phys 135c Spring 2007 Michael Mendenhall
Neutrinoless Double Beta Decay Phys 135c Spring 2007 Michael Mendenhall Theory Overview neutrino Lagrangian ν c iγ 2 γ 0 ν T L ν = M D [ν R ν L + ν c LνR] c }{{} + M L [ν c Lν L + ν L νl] c + M R [ν c
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 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 informationNess LUNA II facility. INFN underground Gran Sasso Laboratories. P. Corvisiero INFN - Italy
Ness 2002 LUNA II facility INFN underground Gran Sasso Laboratories P. Corvisiero INFN - Italy the pp chain p + p d + e + + + ν e e d + p 3 3 He He + γγ 84.7 % 13.8 % 3 3 He He + 3 3 He He α + 2p 3 2p
More informationK. Zuber, Techn. Univ. Dresden Cocoyoc, Status of double beta decay searches
K. Zuber, Techn. Univ. Dresden Status of double beta decay searches How to explain everything about double beta in 45 mins Cocoyoc, 6.1.2009 Contents General introduction Experimental considerations GERDA
More information+ 6S 2. O H + 2Cr S Which substance is the reducing agent in the reaction below? + 2H 2. Pb + PbO 2 SO 4
JASPERSE CHEM 160 PRACTICE TEST 4 VERSIN 1 Ch. 19 Electrochemistry Ch. 20 Nuclear Chemistry Formulas: E cell =E reduction + E oxidation G = nfe cell (for kj, use F = 96.5) E cell = E [0.0592/n]log Q log
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 informationINTRODUCTION TO MEDICAL PHYSICS 1 Quiz #1 Solutions October 6, 2017
INTRODUCTION TO MEDICAL PHYSICS 1 Quiz #1 Solutions October 6, 2017 This is a closed book examination. Adequate information is provided you to solve all problems. Be sure to show all work, as partial credit
More informationPoS(EPS-HEP2017)074. Darkside Status and Prospects. Charles Jeff Martoff Temple University
Temple University E-mail: cmartoff@gmail.com The DarkSide Dark Matter Search Program is a direct-detection search for dark matter using a Liquid Argon Time Projection Chamber. The detector is designed
More informationMeasuring Neutron Capture Cross Sections on s-process Radioactive Nuclei
Measuring Neutron Capture Cross Sections on s-process Radioactive Nuclei 5th Workshop on Nuclear Level Density and Gamma Strength Oslo, May 18-22, 2015 LLNL-PRES-670315 LLNL-PRES-XXXXXX This work was performed
More informationK. Zuber, Uni. Sussex NNR 05, Osaka Status of COBRA
K. Zuber, Uni. Sussex NNR 05, Osaka 2-4.12. 2005 Status of COBRA Contents Introduction Current status of COBRA The 64 detector array Longer term planning Summary C0BRA Use large amount of CdZnTe Semiconductor
More informationRivelazione di neutrini solari - Borexino Lino Miramonti 6 Giugno 2006 Gran Sasso
Rivelazione di neutrini solari - Borexino Lino Miramonti 6 Giugno 2006 Gran Sasso 1 RADIOCHEMICAL Integrated in energy and time CHERENKOV Less than 0.01% of the solar neutrino flux is been measured in
More informationResults on neutrinoless double beta decay of 76 Ge from GERDA Phase I
Home Search Collections Journals About Contact us My IOPscience Results on neutrinoless double beta decay of 76 Ge from GERDA Phase I This content has been downloaded from IOPscience. Please scroll down
More information