The ORNL analysis technique for extracting β -delayed multi-neutron branching ratios with BRIKEN
The ORNL analysis technique for extracting β -delayed multi-neutron branching ratios with BRIKEN
复制标题
用 BRIKEN 提取 β 延迟多中子支化比的 ORNL 分析技术
DOI：
10.1016/j.nima.2018.09.121
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Hall, O.
中科院分区：
文献类型：
--
作者：
Rasco, B.C.;Brewer, N.T.;Yokoyama, R.;Grzywacz, R.;Rykaczewski, K.P.;Tolosa-Delgado, A.;Agramunt, J.;Taín, J.L.;Algora, A.;Hall, O.
为了评估大型放射性衰变网络，有许多选择。影响β衰变缓发单中子和多中子发射分支率的参数很多。我们描述了衰变模型，背景和其他参数的假设和它们对β衰变缓发多中子发射分析的影响。本文介绍了一种测定重离子碎裂产生的β中子前体中β缓发多中子分支比的分析技术--ORNL BRIKEN分析程序。该技术基于估计与离子注入和β触发同时发生的零个、一个和两个中子的初始活动。该技术允许提取用3 He BRIKEN中子计数器测量的β缓发多中子衰变分支比。作为一个例子，两个分析的β-中子发射体77铜的基础上不同的先验假设沿着与文献值的比较。
Many choices are available in order to evaluate large radioactive decay networks. There are many parameters that influence the calculated β-decay delayed single and multi-neutron emission branching fractions. We describe assumptions about the decay model, background, and other parameters and their influence on β-decay delayed multi-neutron emission analysis. An analysis technique, the ORNL BRIKEN analysis procedure, for determining β-delayed multi-neutron branching ratios in β-neutron precursors produced by means of heavy-ion fragmentation is presented. The technique is based on estimating the initial activities of zero, one, and two neutrons occurring in coincidence with an ion-implant and β trigger. The technique allows one to extract β-delayed multi-neutron decay branching ratios measured with the 3 He BRIKEN neutron counter. As an example, two analyses of the β-neutron emitter 77 Cu based on different a priori assumptions are presented along with comparisons to literature values.