中子脉冲监测中裂变偶探测器的伽马补偿方法

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英文篇名：Means of Gamma Compensated Fission Couple in Neutron Pulse Monitoring 作者：鲁艺 ; 李兵 ; 梁文峰 英文作者：LU Yi;LI Bing;LIANG Wenfeng;Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics; 关键词：裂变偶 ; 伽马补偿 ; 热电势 ; 沉积能量 英文关键词：fission couple;;gamma compensation;;thermoelectric potential;;deposited energy 中文刊名：HKXY 英文刊名：Nuclear Science and Engineering 机构：中国工程物理研究院核物理与化学研究所; 出版日期：2019-04-15 出版单位：核科学与工程 年：2019 期：v.39;No.156 基金：国家自然科学基金面上基金资助项目(11775198) 语种：中文; 页：HKXY201902003 页数：9 CN：02 ISSN：11-1861/TL 分类号：19-27

摘要

针对脉冲中子场伽马射线在裂变偶中引起的温升效应,建立了基于ANSYS的伽马补偿裂变偶仿真模型,计算了裂变珠以及补偿材料珠中的伽马沉积能量,分析了铋、钛、康铜等几种金属材料对裂变珠内伽马吸收所致温升补偿结果的影响。结果表明,采用φ1 mm铋珠、φ1 mm钛珠以及φ1 mm康铜珠作为补偿珠,通过与裂变铀珠反向串接,可以消除裂变珠内98%的伽马能量沉积所引起的温升,从而得到仅仅对入射中子灵敏的裂变偶探测器。
        The theoretical model of the gamma compensated fission couple based on ANSYS has been built in order to analyze the temperature effects due to gamma ray in the fission couples. The gamma deposit energy in the ~(235)U bead and the compensatory beads were calculated,and the compensatory effects of different materials were obtained. The results indicated that 98% temperature rise in the ~(235)U bead due to gamma ray can be eliminated by putting a bismuth bead,a titanium bead and a cuprum bead of φ1 mm in reverse with ~(235)U bead,and a gamma compensated fission couple which was sensitive to neutron could be achieved.

引文

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