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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Validation of differential cross sections by means of 252 Cf spectral averaged cross sections
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Validation of differential cross sections by means of 252 Cf spectral averaged cross sections

机译：借助于252 CF光谱平均横截面验证差分横截面

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摘要

Abstract The results of systematic evaluations of the spectrum-averaged cross section measurements performed in the spontaneous fission 252 Cf neutron field are presented. The Following threshold reactions were investigated: 23 Na(n,2n) 22 Na, 54 Fe(n,p) 54 Mn, 54 Fe(n,α) 51 Cr, 27 Al(n,p) 27 Mg, 27 Al(n,α) 24 Na, 19 F(n,2n) 18 F, 90 Zr(n,2n) 89 Zr and 89 Y(n,2n) 88 Y. The spectrum-averaged cross sections for 23 Na(n,2n) 22 Na, 54 Fe(n,α) 51 Cr and 89 Y(n,2n) 88 Y reactions were measured for the first time. This quantity is compared with calculations carried with the IRDFF-v1.05 library. There is a notable disagreement exceeding uncertainties only for 54 Fe(n,p) 54 Mn and 54 Fe(n,α) 51 Cr reactions. The spectrum-averaged cross sections were inferred from experimentally determined reaction rates. The experimental reaction rates were derived for irradiated samples from the Net Peak Areas measured using the semiconductor high purity germanium spectroscopy. The presented experimental data can be used to validate nuclear data libraries and reactions used in the practical reactor dosimetry and to specify high energy tail of the 252 Cf neutron spectrum. Highlights ? Spectral averaged cross sections in the spontaneous fission 252 Cf neutron field. ? 23 Na(n,2n) 22 Na, 54 Fe(n,p) 54 Mn, 54 Fe(n,α) 51 Cr, 27 Al(n,p) 27 Mg, 27 Al(n,α) 24 Na, 19 F(n,2n) 18 F, 90 Zr(n,2n) 89 Zr and 89 Y(n,2n) 88 Y reactions are investigated. ? Spectral averaged cross sections results are compared with IRDFF library.
机译：摘要提出了在自发裂变252CF中子场中进行的频谱平均横截面测量的系统评价的系统评价。研究了以下阈值反应：23 Na（N，2N）22 Na，54 Fe（N，P）54mN，54 Fe（n，α）51cr，27 al（n，p）27mg，27 al（ n，α）24 na，19 f（n，2n）18 f，90 zr（n，2n）89 zr和89 y（n，2n）88y .33 na的光谱平均横截面（n，2n第一次测量22A，54 Fe（n，α）51和89 y（n，2n）88 y反应。将该数量与IRDFF-V1.05库进行的计算进行比较。有一个值得注意的分歧超过54 Fe（n，p）54mn和54 fe（n，α）51 cr反应的不确定性。从实验确定的反应速率推断出光谱平均横截面。衍生实验反应速率用于使用半导体高纯度锗光谱测量的净峰面积的照射样品。所呈现的实验数据可用于验证实际反应器剂量测定法中使用的核数据文库和反应，并指定252 CF中子谱的高能量尾。强调 ？自发裂变252CF中子场中的光谱平均横截面。还23 na（n，2n）22 na，54 fe（n，p）54mn，54 fe（n，α）51 cr，27 al（n，p）27mg，27 al（n，α）24 na，研究了19 f（n，2n）18 f，90 zr（n，2n）89 zr和89 y（n，2n）88 y反应。还将光谱平均横截面与IRDFF库进行比较。

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