High-efficiency 3He proportional counter for the detection of delayed neutrons

被引：11
|
作者：
Loaiza, DJ [1 ]
机构：
[1] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1999年 / 422卷 / 1-3期
关键词：
D O I：
10.1016/S0168-9002(98)01059-6
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The characteristics of a high-efficiency He-3 proportional counter for the measurement of beta(i)-delayed neutrons have been examined. The detection system required for this experiment needs to meet some stringent requirements such as high-efficiency, low dead time, and gamma-insensitivity. The He-3 counter described here meets all these requirements. This detection system consists of an array of 20 He-3 tubes embedded in polyethylene. The principal operating characteristic of this proportional counter is its high efficiency. The absolute efficiency, determined with an Am/Li source, is 29.04% +/- 0.6%. The system's dead time is 0.46 +/- 0.02 mu s. It is also displacement insensitive within a range of 10 cm. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：43 / 46
页数：4
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