Differential die-away analysis system response modeling and detector design

被引：28

作者：

Jordan, K. A. ^{[1
]}

Gozani, T. ^{[2
]}

Vujic, J. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

[2] Rapiscan Syst Neutron & Adv Technol Corp, Sunnyvale, CA 94085 USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2008年 / 589卷 / 03期

关键词：

nuclear material detection; SNM; differential die-away analysis; neutron poisons; epithermal neutron detectors;

D O I：

10.1016/j.nima.2008.02.039

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Differential die-away-analysis (DDAA) is a sensitive technique to detect presence of fissile materials such as U-235 and Pu-239. DDAA uses a high-energy (14 MeV) pulsed neutron generator to interrogate a shipping container. The signature is a fast neutron signal hundreds of microseconds after the cessation of the neutron pulse. This fast neutron signal has decay time identical to the thermal neutron diffusion decay time of the inspected cargo. The theoretical aspects of a cargo inspection system based on the differential die-away technique are explored. A detailed mathematical model of the system is developed, and experimental results validating this model are presented. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：436 / 444

页数：9

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