In this study, a new detector is designed based on CR-39, and separately calibrated for protons, neutrons and $$\upalpha $$-particles under the same etching condition. To that end, an americium–beryllium standard source ($${}^{241}\hbox {Am--Be}$$) and a plexiglass phantom for neutron irradiation, brass collimators and an americium standard source ($${}^{241}\hbox {Am})$$ for alpha irradiation, as well as a Van de Graaff accelerator for proton irradiation were employed. Sodium hydroxide solution of 6.25 N at $$85^{\circ }\hbox {C}$$ was also used for CR-39 chemical etching. Considering the detection principle of the device, different filters were designed to help distinguish between fast neutron particles, thermal neutrons, albedo neutrons, protons and $$\upalpha $$-particles in mixed radiation fields. Moreover, both the contribution of each particle and the ability of the designed detector to discriminate energy of charged particles were quantified.

中文翻译：

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用于在混合辐射场中分离中子、质子和 $$\upalpha $$α 粒子的无源探测器的设计和校准

在本研究中，基于CR-39设计了一种新型探测器，并在相同蚀刻条件下分别对质子、中子和$$\upalpha $$-粒子进行校准。为此，镅-铍标准源（$${}^{241}\hbox {Am--Be}$$）和用于中子辐射的有机玻璃体模、黄铜准直器和镅标准源（$${} ^{241}\hbox {Am})$$ 用于α 辐照，以及用于质子辐照的范德格拉夫加速器。6.25 N 的氢氧化钠溶液 $85^{\circ}\hbox {C}$$ 也用于 CR-39 化学蚀刻。考虑到该装置的探测原理，设计了不同的过滤器来帮助区分混合辐射场中的快中子粒子、热中子、反照率中子、质子和$$\upalpha $$-粒子。而且，