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锰浴法绝对测量中子源发射率 预览 被引量:1

Absolute Measurement of Neutron Source Emission Rate With Manganese Bath Method
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摘要 锰浴法是目前绝对测量中子源发射率(中子源强度)最广泛、精度最高的方法之一。将已知活度的56 Mn溶液倒入锰池中,通过两路NaI(Tl)探测器测量锰液中56 Mn的γ计数,确定系统效率,然后通过锰液饱和活化计数得到中子源强度。利用锰浴法中子源强度标准装置绝对测量了标准241 Am-Be(α,n)中子源的强度。该中子源是国际电离辐射咨询委员会组织的国际比对CCRI(Ⅲ)-K9.AmBe的传递标准源。测量结果与比对平均值在不确定度范围内一致,验证了本标准装置的可靠性。 The manganese bath method is one of the most widespread and exact method to measure neutron source emission rate(neutron source intensity) absolutely at present.Pouring some 56Mn solution with known activity into the bath,the system efficiency can be obtained from γ counts of 56Mn,which is measured by two NaI(Tl) detectors.From saturated counts of a 241Am-Be(α,n) neutron source in the bath,the source emission rate can be obtained.An standard 241Am-Be(α,n) source which is the transfer source of the CCRI(Ⅲ)-K9.AmBe international key comparison organized by the Comité Consultatif des Rayonnements Ionisants,was measured absolutely with the neutron source emission rate standard equipment(manganese bath method).The result is coincident with the average value of the comparison within the uncertainties,therefore the reliability of the standard equipment is verified.
作者 刘毅娜 王志强 李春娟 骆海龙 汪建清 陈细林 LIU Yi-na,WANG Zhi-qiang,LI Chun-juan,LUO Hai-long,WANG Jian-qing,CHEN Xi-lin(China Institute of Atomic Energy,Beijing 102413,China)
出处 《原子能科学技术》 EI CAS CSCD 北大核心 2013年第6期1044-1047,共4页 Atomic Energy Science and Technology
关键词 中子源发射率 绝对测量 锰浴法 国际比对 neutron source emission rate absolute measurement manganese bath method international key comparison
作者简介 作者简介:刘毅娜(1981-),女,陕西西安人,助理研究员,硕士,电离辐射计量专业
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同被引文献8

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