Evaluation of pixellated CZT detectors for neutrinoless double beta-decay measurements

被引：17

作者：

Bloxham, T. R. ^{[1
]}

Freer, M. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 572卷 / 02期

关键词：

neutrinoless double beta-decay; pixellated CZT detectors; background reduction; COBRA-experiment;

D O I：

10.1016/j.nima.2006.12.004

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The COBRA neutrinoless double beta-decay experiment is currently based in the Gran Sasso underground laboratory. It employs CdZnTe (CZT) detectors which provide both source and detector. Key to these measurements is the reduction of backgrounds to a level at which the system becomes sensitive to half-lives which would potentially allow a determination of the neutrino mass. Here, we evaluate how a pixellated detector with a pixel size approaching 200 mu m would provide a method for enhancing both the experimental signal and suppressing backgrounds present inside the detector volume. It is found that it could be possible to reduce backgrounds from natural activities by up to three orders of magnitude and that neutrinoless double beta-decays can be distinguished from single beta-particles with an efficiency of 70%. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：722 / 728

页数：7

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