Detection of γ-rays with a 3.5 1 liquid xenon ionization chamber triggered by the primary scintillation light

被引：10
|
作者：
Aprile, E [1 ]
Bolotnikov, A [1 ]
Chen, DL [1 ]
Muhkerjee, R [1 ]
Xu, F [1 ]
机构：
[1] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 480卷 / 2-3期
基金：
美国国家航空航天局;
关键词：
D O I：
10.1016/S0168-9002(01)01204-9
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A gridded ionization chamber with a drift length of 4.5 cm and a total volume of 3.5 1, was operated with high-purity liquid xenon and extensively tested with gamma-rays from Cs-137, Na-22 and Co-60 radioactive sources. An electron lifetime in excess of I ins was inferred from two independent measurements. The electric Field dependence of the collected charge and energy resolution was studied in the range 0.1-4 kV/cm, for different gamma-ray energies, With an electric field of 4 kV/cm, the spectral performance of the detector is consistent with an energy resolution of 5.9% at 1 MeV, scaling with energy as E-0.5 The chamber was also used to detect the primary scintillation light produced by gamma-ray interactions in liquid xenon. The light signal was successfully used to trigger the acquisition of the charge signal with a FADC readout. A trigger efficiency of similar to85% was measured at 662 keV. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：636 / 650
页数：15
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