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溴化镧中子探测机理
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作者 刘翠红 杨永新 +2 位作者 曾志 李君利 吕汶辉 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2022年第11期1566-1571,1620,共7页
为解决溴化镧无法用于实验室外中子探测问题,本文采用理论分析、蒙特卡罗模拟与实验室测量相结合的方法,从微观物理过程入手,分析了中子与溴化镧相互作用类型、反应截面及反应产物。结果表明:可利用中子与溴化镧晶体发生非弹性散射产生... 为解决溴化镧无法用于实验室外中子探测问题,本文采用理论分析、蒙特卡罗模拟与实验室测量相结合的方法,从微观物理过程入手,分析了中子与溴化镧相互作用类型、反应截面及反应产物。结果表明:可利用中子与溴化镧晶体发生非弹性散射产生的退激γ射线,实现溴化镧探测器直接测量中子。研究成果为溴化镧中子探测奠定了物理基础,也为其用于中子/γ混合辐射场测量提供了前提条件。 展开更多
关键词 溴化镧 中子响应 非弹性散射 蒙特卡罗模拟 中子特征γ峰 中子探测 镅铍中子源 响应能谱
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Modeling and Experiments of the Gain and Noise Figure for an Irradiated Erbium-Ytterbium Co-Doped Fiber Amplifier
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作者 Sherif S. Nafee Taymour A. Hamdalla 《Journal of Analytical Sciences, Methods and Instrumentation》 2014年第2期53-61,共9页
It is crucial to study the effect of radiation on the fiber amplifier devices. In the present paper, the Erbium-ytterbium co-doped fiber amplifier (EYDFA) has been irradiated by a neutron beam of different doses for v... It is crucial to study the effect of radiation on the fiber amplifier devices. In the present paper, the Erbium-ytterbium co-doped fiber amplifier (EYDFA) has been irradiated by a neutron beam of different doses for various exposure times from an Am-241/Be-9 neutron source. The gain and noise figure of the EYDFA have been calculated theoretically and recorded after and before the irradiation to test its performance under the effect of irradiation. In order to show the enhancement in the gain of the fiber amplifier devices, a comparison between the gain of the irradiated EYDFA and Erbium doped Fiber amplifier (EDFA) has been carried out. The calculated results by the proposed model are in good agreement with the experimental ones. It indicates that the gain of EYDFA deteriorates after being irradiated by a neutron dose. Moreover, the gain of irradiated EYDFA has been reduced to 13.8 dB at a dose of 720 Gy. 展开更多
关键词 Erbium-Ytterbium Co-Doped Fiber Amplifier americium/beryllium-neutron source GAIN Deterioration
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