Simulations of neutron background in a time projection chamber relevant to dark matter searches

被引：21

作者：

Carson, MJ ^{[1
]}

Davies, JC ^{[1
]}

Daw, E ^{[1
]}

Hollingworth, RJ ^{[1
]}

Kirkpatrick, JA ^{[1
]}

Kudryavtsev, VA ^{[1
]}

Lawson, TB ^{[1
]}

Lightfoot, PK ^{[1
]}

McMillan, JE ^{[1
]}

Morgan, B ^{[1
]}

Paling, SM ^{[1
]}

Robinson, M ^{[1
]}

Spooner, N ^{[1
]}

Tovey, DR ^{[1
]}

Tziaferi, E ^{[1
]}

机构：

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

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2005年 / 546卷 / 03期

关键词：

dark matter; WIMPs; neutron background; neutron flux; spontaneous fission; (alpha; n); reactions; radioactivity; cosmic-ray mucus underground;

D O I：

10.1016/j.nima.2005.03.121

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Presented here are results of simulations of neutron background performed for a time projection chamber acting as a particle dark matter detector in an underground laboratory. The investigated background includes neutrons from rock and detector components, generated via spontaneous fission and (alpha,n) reactions, as well as those due to cosmic-ray muons. Neutrons were propagated to the sensitive volume of the detector and the nuclear recoil spectra were calculated. Methods of neutron background suppression were also examined and limitations to the sensitivity of a gaseous dark matter detector are discussed. Results indicate that neutrons should not limit sensitivity to WIMP-nucleon interactions down to a level of (I - 3) x 10(-8) pb in a 10 kg detector. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：509 / 522

页数：14

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