The expected background spectrum in NaI dark matter detectors and the DAMA result

被引：26

作者：

Kudryavtsev, V. A. ^{[1
]}

Robinson, M. ^{[1
]}

Spooner, N. J. C. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

ASTROPARTICLE PHYSICS | 2010年 / 33卷 / 02期

关键词：

Dark matter; WIMPs; Background radiation; Radioactivity; DAMA experiment; MODULATION; DAMA/LIBRA; SEARCH;

D O I：

10.1016/j.astropartphys.2009.12.003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Detailed Monte Carlo simulations of the expected radioactive background rates and spectra in NaI crystals are presented. The obtained spectra are then compared to those measured in the DAMA/NaI and DAMA/LIBRA experiments. The simulations can be made consistent with the measured DAMA spectrum only by assuming higher than reported concentrations of some isotopes and even so leave very little room for the dark matter signal. We conclude that any interpretation of the annual modulation of the event rate observed by DAMA as a dark matter signal, should include full consideration of the background spectrum. This Would significantly restrict the range of dark matter models capable of explaining the modulation effect. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：91 / 96

页数：6

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