一种为瞬发伽马中子活化分析设计的紧凑型中子束发生器系统。
A compact neutron beam generator system designed for prompt gamma nuclear activation analysis.
作者信息
Ghassoun J, Mostacci D
机构信息
EPRA, Department of Physics, Faculty of Sciences, Semlalia, P.O. Box 2390, 40000 Marrakech, Morocco.
出版信息
Appl Radiat Isot. 2011 Aug;69(8):1138-42. doi: 10.1016/j.apradiso.2010.11.014. Epub 2010 Nov 19.
In this work a compact system was designed for bulk sample analysis using the technique of PGNAA. The system consists of (252)Cf fission neutron source, a moderator/reflector/filter assembly, and a suitable enclosure to delimit the resulting neutron beam. The moderator/reflector/filter arrangement has been optimised to maximise the thermal neutron component useful for samples analysis with a suitably low level of beam contamination. The neutron beam delivered by this compact system is used to irradiate the sample and the prompt gamma rays produced by neutron reactions within the sample elements are detected by appropriate gamma rays detector. Neutron and gamma rays transport calculations have been performed using the Monte Carlo N-Particle transport code (MCNP5).
在这项工作中，设计了一种紧凑的系统，用于使用PGNAA技术对大量样品进行分析。该系统由²⁵²Cf裂变中子源、慢化剂/反射器/过滤器组件以及用于限定产生的中子束的合适外壳组成。慢化剂/反射器/过滤器装置已进行了优化，以最大化对样品分析有用的热中子成分，并使束污染水平适当降低。这个紧凑系统发出的中子束用于照射样品，样品元素内中子反应产生的瞬发伽马射线由适当的伽马射线探测器进行探测。已使用蒙特卡罗N粒子输运代码（MCNP5）进行了中子和伽马射线输运计算。
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