使用具有纳秒级定时的便携式中子源探测埋藏的爆炸物。

Detection of buried explosives using portable neutron sources with nanosecond timing.

作者信息

Kuznetsov A V, Evsenin A V, Gorshkov I Yu, Osetrov O I, Vakhtin D N

机构信息

V.G.Khlopin Radium Institute, 28, 2nd Murinsky pr., Saint-Petersburg 194021, Russia.

出版信息

Appl Radiat Isot. 2004 Jul;61(1):51-7. doi: 10.1016/j.apradiso.2004.02.016.

DOI:10.1016/j.apradiso.2004.02.016

PMID:15145438

Abstract

Significant reduction of time needed to identify hidden explosives and other hazardous materials by the "neutron in, gamma out" method has been achieved by introducing timed (nanosecond) neutron sources-the so-called nanosecond neutron analysis technique. Prototype mobile device for explosives' detection based on a timed (nanosecond) isotopic (252)Cf neutron source has been created. The prototype is capable of identifying 400 g of hidden explosives in 10 min. Tests have been also made with a prototype device using timed (nanosecond) neutron source based on a portable D-T neutron generator with built-in segmented detector of accompanying alpha-particles. The presently achieved intensity of the neutron generator is 5x10(7)n/s into 4pi, with over 10(6) of these neutrons being correlated with alpha-particles detected by the built-in alpha-particle detector. Results of measurements with an anti-personnel landmine imitator are presented.

摘要

通过引入定时（纳秒级）中子源，即所谓的纳秒中子分析技术，“中子进，伽马出”方法识别隐藏爆炸物及其他危险材料所需的时间大幅缩短。基于定时（纳秒级）同位素（²⁵²）Cf中子源的爆炸物探测移动设备原型已制造出来。该原型能够在10分钟内识别400克隐藏爆炸物。还使用了基于便携式D-T中子发生器及内置伴随α粒子分段探测器的定时（纳秒级）中子源对原型设备进行了测试。目前中子发生器的强度为4π立体角内5×10⁷个中子/秒，其中超过10⁶个中子与内置α粒子探测器探测到的α粒子相关。文中给出了使用杀伤人员地雷模拟器的测量结果。