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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >The thermoluminescence response of doped SiO2 optical fibres subjected to fast neutrons.
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The thermoluminescence response of doped SiO2 optical fibres subjected to fast neutrons.

机译：快中子对掺杂SiO2光纤的热致发光响应。

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摘要

This paper describes a preliminary study of the thermoluminescence (TL) response of doped SiO(2) optical fibres subjected to (241)AmBe neutron irradiation. The TL materials, which comprise Al- and Ge-doped silica fibres, were exposed in close contact with the (241)AmBe source to obtain fast neutron interactions through use of measurements obtained with and without a Cd filter (the filter being made to entirely enclose the fibres). The neutron irradiations were performed for exposure times of 1-, 2-, 3-, 5- and 7-days in a neutron tank filled with water. In this study, use was also made of the Monte Carlo N-particle (MCNP) code version 5 (V5) to simulate the neutron irradiations experiment. It was found that the commercially available Ge-doped and Al-doped optical fibres show a linear dose response subjected to fast neutrons from (241)AmBe source up to seven days of irradiations. The simulation performed using MCNP5 also exhibits a similar pattern, albeit differing in sensitivity. The TL response of Ge-doped fibre is markedly greater than that of the Al-doped fibre, the total absorption cross section for Ge in both the fast and thermal neutrons region being some ten times greater than that of Al.
机译：本文介绍了对受（241）AmBe中子辐照的SiO（2）掺杂光纤的热致发光（TL）响应的初步研究。包含Al和Ge掺杂的二氧化硅纤维的TL材料与（241）AmBe源紧密接触，通过使用在有和没有Cd滤镜的情况下获得的测量值获得快速的中子相互作用（滤镜完全制成包裹纤维）。在充满水的中子罐中进行中子辐照，暴露时间为1天，2天，3天，5天和7天。在这项研究中，还使用了蒙特卡罗N粒子（MCNP）代码版本5（V5）来模拟中子辐照实验。已经发现，市售的掺Ge和掺Al的光纤在来自（241）AmBe源的快速中子的照射下，在长达7天的辐照下表现出线性剂量响应。使用MCNP5进行的仿真也表现出相似的模式，尽管灵敏度不同。掺Ge的纤维的TL响应显着大于掺Al的纤维，快速和热中子区域中Ge的总吸收截面比Al大十倍。

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