Observation of neutrons with a Gadolinium doped water Cherenkov detector

被引：28

作者：

Dazeley, S. ^{[1
]}

Bernstein, A. ^{[1
]}

Bowden, N. S. ^{[1
]}

Svoboda, R. ^{[1
,2
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 607卷 / 03期

关键词：

Water Cherenkov; Neutron detector; Gadolinium; Neutron capture; SYSTEM;

D O I：

10.1016/j.nima.2009.03.256

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Spontaneous and induced fission in Special Nuclear Material (SNM) such as U-235 and Pu-239 results in the emission of neutrons and high energy gamma-rays. The multiplicities of and time correlations between these particles are both powerful indicators of the presence of fissile material. Detectors sensitive to these signatures are consequently useful for nuclear material monitoring, search, and characterization. In this article, we demonstrate sensitivity to both high energy gamma-rays and neutrons with a water Cherenkov-based detector. Electrons in the detector medium, scattered by gamma-ray interactions, are detected by their Cherenkov light emission. Sensitivity to neutrons is enhanced by the addition of a Gadolinium compound to the water in low concentrations. Cherenkov light is similarly produced by an 8 MeV gamma-ray cascade following neutron capture on the Gadolinium. The large solid angle coverage and high intrinsic efficiency of this detection approach can provide robust and low cost neutron and gamma-ray detection with a single device. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：616 / 619

页数：4

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