Background reduction and sensitivity for germanium double beta decay experiments

被引：11

作者：

Gomez, H. ^{[1
]}

Cebrian, S. ^{[1
]}

Morales, J. ^{[1
]}

Villar, J. A. ^{[1
]}

机构：

[1] Univ Zaragoza, Lab Fis Nucl & Altas Energy, E-50009 Zaragoza, Spain

来源：

ASTROPARTICLE PHYSICS | 2007年 / 28卷 / 4-5期

关键词：

double beta decay; germanium detectors; granularity; segmentation; pulse shape analysis; sensitivity;

D O I：

10.1016/j.astropartphys.2007.08.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Germanium detectors have very good capabilities for the investigation of rare phenomena like the neutrinoless double beta decay. Rejection of the background entangling the expected signal is one primary goal in this kind of experiments. Here, the attainable background reduction in the energy region where the neutrinoless double beta decay signal of Ge-76 is expected to appear has been evaluated for experiments using germanium detectors, taking into consideration different strategies like the granularity of the detector system, the segmentation of each individual germanium detector and the application of pulse shape analysis techniques to discriminate signal from background events. Detection efficiency to the signal is affected by background rejection techniques, and therefore it has been estimated for each of the background rejection scenarios considered. Finally, conditions regarding crystal mass, radiopurity, exposure to cosmic rays, shielding and rejection capabilities are discussed with the aim to achieve a background level of similar to 10(-3) c keV(-1) kg(-1) year(-1) in the region of interest, which would allow to explore neutrino effective masses around similar to 40 meV. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：435 / 447

页数：13

共 44 条

[1] Neutrinoless double-β decay of 76Ge:: First results from the International Germanium Experiment (IGEX) with six isotopically enriched detectors [J].

Aalseth, CE ;

Avignone, FT ;

Brodzinski, RL ;

Collar, JI ;

Garcia, E ;

González, D ;

Hasenbalg, F ;

Hensley, WK ;

Kirpichnikov, IV ;

Klimenko, AA ;

Miley, HS ;

Morales, A ;

Morales, J ;

de Solórzano, AO ;

Osetrov, SB ;

Pogosov, VS ;

Puimedón, J ;

Reeves, JH ;

Salinas, A ;

Sarsa, ML ;

Smolnikov, AA ;

Starostin, AS ;

Tamanyan, AG ;

Vasenko, AA ;

Vasiliev, SI ;

Villar, JA .

PHYSICAL REVIEW C, 1999, 59 (04) :2108-2113

[2] IGEX 76Ge neutrinoless double-beta decay experiment:: Prospects for next generation experiments -: art. no. 092007 [J].

Aalseth, CE ;

Avignone, FT ;

Brodzinski, RL ;

Cebrian, S ;

Garcia, E ;

Gonzalez, D ;

Hensley, WK ;

Irastorza, IG ;

Kirpichnikov, IV ;

Klimenko, AA ;

Miley, HS ;

Morales, A ;

Morales, J ;

de Solorzano, AO ;

Osetrov, SB ;

Pogosov, VS ;

Puimedon, J ;

Reeves, JH ;

Sarsa, ML ;

Smolnikov, AA ;

Starostin, AS ;

Tamanyan, AG ;

Vasenko, AA ;

Vasiliev, SI ;

Villar, JA .

PHYSICAL REVIEW D, 2002, 65 (09) :6

[3] Characterization of the first true coaxial 18-fold segmented n-type prototype HPGe detector for the GERDA project [J].

Abt, I. ;

Caldwell, A. ;

Gutknecht, D. ;

Kroeninger, K. ;

Lampert, M. ;

Liu, X. ;

Majorovits, B. ;

Quirion, D. ;

Stelzer, F. ;

Wendling, P. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 577 (03) :574-584

[4] Background reduction in neutrinoless double beta decay experiments using segmented detectors -: A Monte Carlo study for the GERDA setup [J].

Abt, I. ;

Altmann, M. ;

Caldwell, A. ;

Kroeninger, K. ;

Liu, X. ;

Majorovits, B. ;

Pandola, L. ;

Tomei, C. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 570 (03) :479-486

[5]

ABT I, IN PRESS NUCL INST A

[6]

ABT I, GERDA LETT INTENT NE

[7] GEANT4-a simulation toolkit [J].

Agostinelli, S ;

Allison, J ;

Amako, K ;

Apostolakis, J ;

Araujo, H ;

Arce, P ;

Asai, M ;

Axen, D ;

Banerjee, S ;

Barrand, G ;

Behner, F ;

Bellagamba, L ;

Boudreau, J ;

Broglia, L ;

Brunengo, A ;

Burkhardt, H ;

Chauvie, S ;

Chuma, J ;

Chytracek, R ;

Cooperman, G ;

Cosmo, G ;

Degtyarenko, P ;

Dell'Acqua, A ;

Depaola, G ;

Dietrich, D ;

Enami, R ;

Feliciello, A ;

Ferguson, C ;

Fesefeldt, H ;

Folger, G ;

Foppiano, F ;

Forti, A ;

Garelli, S ;

Giani, S ;

Giannitrapani, R ;

Gibin, D ;

Cadenas, JJG ;

González, I ;

Abril, GG ;

Greeniaus, G ;

Greiner, W ;

Grichine, V ;

Grossheim, A ;

Guatelli, S ;

Gumplinger, P ;

Hamatsu, R ;

Hashimoto, K ;

Hasui, H ;

Heikkinen, A ;

Howard, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 506 (03) :250-303

[8]

Aleksandrov Yu. V., 1995, Bulletin of the Russian Academy of Sciences. Physics, V59, P895

[9] Next generation double-beta decay experiments: metrics for their evaluation [J].

Avignone, FT ;

King, GS ;

Zdesenko, YG .

NEW JOURNAL OF PHYSICS, 2005, 7 (07)

[10] THEORETICAL AND EXPERIMENTAL INVESTIGATION OF COSMOGENIC RADIOISOTOPE PRODUCTION IN GERMANIUM [J].

AVIGNONE, FT ;

BRODZINSKI, RL ;

COLLAR, JI ;

MILEY, HS ;

GARCIA, E ;

MORALES, A ;

MORALES, J ;

NUNEZLAGOS, R ;

REEVES, JH ;

SAENZ, C ;

VILLAR, JA .

NUCLEAR PHYSICS B, 1992, :280-285

← 1 2 3 4 5 →