Optimization of a neutron detector for pulsed photonuclear monitoring of fissile materials

被引：0

作者：

Bakalyarov, A. M. ^{[1
]}

Germanov, A. B. ^{[1
]}

Karetnikov, M. D. ^{[1
]}

Lebedev, V. I. ^{[1
]}

Yakovlev, G. V. ^{[1
]}

机构：

[1] Russian Sci Ctr, Kurchatov Inst, Moscow, Russia

来源：

ATOMIC ENERGY | 2009年 / 106卷 / 01期

关键词：

Neutron Flux; Neutron Detector; Neutron Emission; Electron Beam Energy; Photonuclear Reaction;

D O I：

10.1007/s10512-009-9131-4

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The objective of the present work is optimization of the geometry of a multilayer detector used in the pulsed photonuclear method of remote monitoring of fissile materials. Numerical simulation of the conversion of an electron beam into bremsstrahlung and the interaction of the latter radiation with components of the facility and the contents of the object of monitoring, resulting in neutron emission, is performed. The spectral-time parameters of the neutron flux arriving at the detector are obtained and the probability of detecting neutrons with different energy is calculated as a function of the thickness of the layers for moderation and absorption. The construction of the detector giving high fission-neutron detection efficiency and low sensitivity to background neutrons is chosen. The data obtained were used to build the neutron detector used in the experimental model of a facility for detecting fuel-cycle materials by the photonuclear method based on the U-28 accelerator.

引用

页码：60 / 66

页数：7

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