239Pu Fission Spectrum Cumulative Fission Product Yield Measurement Using Godiva IV Critical Assembly

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets Pub Date : 2024-02-01 DOI:10.1016/j.nds.2024.01.007

A.S. Tamashiro , J.T. Harke , J.G. Duarte , Y. Mishnayot , S.W. Padgett , G. Slavik , S. Burcher , N. Harward , N. Gharibyan , R.A. Henderson , L.R. Greenwood , B.D. Pierson , J.M. Goda , J.A. Bounds , D.K. Hayes , C.J. Palmer

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引用次数: 0

Abstract

Precise integral measurement of fast neutron-induced fission product yields for various actinides is of high interest for applied nuclear science. The goal of this effort is to improve uncertainties in fission product yield values of ²³⁹Pu. Fission was induced in a pure ²³⁹Pu ( $> 99 %$ ) target using the Godiva IV critical assembly in burst mode. The irradiated sample was transferred to a high-resolution γ-ray detector within 45 minutes. γ-ray list mode data was collected from 45 minutes to 1 week after the irradiation. γ-ray spectroscopy was performed to analyze the time dependent γ-ray yields using an automated peak search algorithm to identify isotopes by their decay γ-ray energy and half-life. The initial activity for each isotope identified was used to calculate their fission product yield.

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利用戈迪瓦四临界组件测量 239Pu 裂变谱累积裂变产物当量

对各种锕系元素的快中子诱发裂变产物产率进行精确的整体测量对应用核科学具有重要意义。这项工作的目标是改善 239Pu 裂变产物产率值的不确定性。在猝发模式下，使用 Godiva IV 临界组件在纯 239Pu (>99%) 靶件中诱发了裂变。辐照样品在 45 分钟内被转移到高分辨率 γ 射线探测器上。利用自动峰值搜索算法，通过衰变γ射线能量和半衰期来识别同位素。所确定的每种同位素的初始活度都被用来计算其裂变产物产率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Data Sheets 物理-物理：核物理

CiteScore

7.80

自引率

5.40%

发文量

审稿时长

>12 weeks

期刊介绍： The Nuclear Data Sheets are current and are published monthly. They are devoted to compilation and evaluations of experimental and theoretical results in Nuclear Physics. The journal is mostly produced from Evaluated Nuclear Structure Data File (ENSDF), a computer file maintained by the US National Nuclear Data Center