Measurements of scintillation efficiency and pulse shape for low energy recoils in liquid xenon

被引：76

作者：

Akimov, D

Bewick, A

Davidge, D

Dawson, J

Howard, AS

Ivaniouchenkov, I

Jones, WG

Joshi, J

Kudryavtsev, VA

Lawson, TB

Lebedenko, V

Lehner, MJ

Lightfoot, PK

Liubarsky, I

Lüscher, R

McMillan, JE

Peak, CD

Quenby, JJ

Spooner, NJC

Sumner, TJ

Tovey, DR

Ward, CK

机构：

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

[2] Inst Theoret & Expt Phys, Moscow 117259, Russia

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

来源：

PHYSICS LETTERS B | 2002年 / 524卷 / 3-4期

关键词：

liquid xenon; dark matter; WIMP; quenching factor; pulse shape;

D O I：

10.1016/S0370-2693(01)01411-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Results of observations of low energy nuclear and electron recoil events in liquid xenon scintillator detectors are given. The relative scintillation efficiency for nuclear recoils is 0.22 +/- 0.01 in the recoil energy range 40-70 keV. Under the assumption of a single dominant decay component to the scintillation pulse shape the log-normal mean parameter To of the maximum likelihood estimator of the decay time constant for 6 keV < E-ee < 30 keV nuclear recoil events is equal to 21.0 +/- 0.5 ns. It is observed that for electron recoils T-0 rises slowly with energy, having a value similar to 30 ns at E-ee similar to 15 keV. Electron and nuclear recoil pulse shapes are found to be well fitted by single exponential functions although some evidence is found for a double exponential form for the nuclear recoil pulse shape. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：245 / 251

页数：7

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