Study and suppression of anomalous fast events in inorganic scintillators for dark matter searches

被引：21

作者：

Kudryavtsev, VA

Spooner, NJC

Lightfoot, PK

Roberts, JW

Lehner, MJ

Gamble, T

Carson, MJ

Lawson, TB

Lüscher, R

McMillan, JE

Morgan, B

Paling, SM

Robinson, M

Tovey, DR

Smith, NJT

Smith, PF

Alner, GJ

Hart, SP

Lewin, JD

Preece, RM

Sumner, TJ

Jones, WG

Quenby, JJ

Ahmed, B

Bewick, A

Davidge, D

Dawson, JV

Howard, AS

Ivaniouchenkov, I

Joshi, MK

Lebedenko, V

Liubarsky, I

Barton, JC

Gerbier, G

Mallet, J

Mosca, L

Tao, C

机构：

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

[2] Univ Aix Marseille 2, F-13288 Marseille 09, France

[3] IN2P3, CNRS, CPPM, F-13288 Marseille 09, France

[4] CEA Saclay, SPP, DAPNIA, DSM, F-91191 Gif Sur Yvette, France

[5] Univ London Queen Mary Coll, Dept Phys, London E1 4NS, England

[6] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[7] Rutherford Appleton Lab, Dept Particle Phys, Didcot OX11 0QX, Oxon, England

来源：

ASTROPARTICLE PHYSICS | 2002年 / 17卷 / 04期

关键词：

scintillation detectors; inorganic crystals; dark matters; WIMP; pulse shape analysis;

D O I：

10.1016/S0927-6505(01)00167-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The status of dark matter searches with inorganic scintillator detectors at Boulby mine is reviewed and the results of tests with a CsI(TI) crystal are presented. The objectives of the latter experiment were to study anomalous fast events previously observed and to identify ways to remove this background, Clear indications were found that these events were due to surface contamination of crystals by alphas, probably from radon decay. A new array of unencapsulated NaI(Tl) crystals immersed either in liquid paraffin or pure nitrogen atmosphere is under construction at Boulby. Such an approach allows complete control of the surface of the crystals and the ability to remove any surface contamination. First data from the unencapsulated NaI(Tl) do not show the presence of anomalous fast events. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：401 / 408

页数：8

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