Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, Prague, 115 19, Czech Republic.
Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, Prague, 115 19, Czech Republic.
Appl Radiat Isot. 2021 Feb;168:109529. doi: 10.1016/j.apradiso.2020.109529. Epub 2020 Nov 27.
The paper describes neutron field characterisation of low-flux multipurpose educational irradiator developed at Czech Technical University in Prague. The irradiator is aimed for demonstration experiments including neutron activation analysis, delayed neutron counting, or studies related to neutron and/or gamma detection and spectrometric devices. It may accommodate various neutron sources including Cf or AmBe radionuclide sources, D-D generator, or in-reactor irradiated nuclear material serving as delayed neutron source, or gamma sources including radionuclide ones or short-lived sources produced in the adjacent reactor. The characterisation was performed based on neutron activation technique using gold foils. It included two experimental parts. The first one verified the level of response symmetry in the four irradiation channels and characterisation of the axial distribution in the irradiation channels. Within the second one, the responses to thermal and epithermal neutrons and the cadmium ratio in the central irradiation position were determined. Whereas the former was determined solely with the Cf source, the latter was performed for all available sources: Cf, AmBe, and the D-D generator. The experimental results were further compared to calculations by the MCNP Monte Carlo code.
本文描述了在捷克技术大学布拉格开发的低通量多用途教育辐照器的中子场特性。该辐照器旨在进行演示实验，包括中子激活分析、延迟中子计数或与中子和/或伽马探测和光谱仪相关的研究。它可以容纳各种中子源，包括 Cf 或 AmBe 放射性核素源、D-D 发生器或作为延迟中子源的反应堆内辐照核材料，以及包括放射性核素源或在相邻反应堆中产生的短寿命源在内的伽马源。特性化是基于使用金箔的中子激活技术进行的。它包括两个实验部分。第一部分验证了四个辐照通道中的响应对称性水平和辐照通道中的轴向分布特性。在第二部分中，确定了热中子和超热中子以及中心辐照位置的镉比的响应。前者仅用 Cf 源确定，而后者则针对所有可用的源：Cf、AmBe 和 D-D 发生器进行。实验结果进一步与 MCNP 蒙特卡罗代码的计算进行了比较。
