Evaluation of the 23Na(N,Gamma) Reaction Cross Section

被引:0
|
作者
Badikov, Sergei [1 ]
Zolotarev, Konstantin [2 ]
机构
[1] Natl Res Nucl Univ, MEPhI, Kashirskoesh 31, Moscow 115409, Russia
[2] Inst Phys & Power Engn, Bondarenko Sq 1, Obninsk 249033, Kaluga Region, Russia
来源
REACTOR DOSIMETRY: 16TH INTERNATIONAL SYMOSIUM | 2018年 / 1608卷
关键词
nuclear data evaluation; evaluation techniques; model defects; experimental biases;
D O I
10.1520/STP160820170066
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
Poor and incomplete uncertainty information for the 23Na(n,g)24Na reaction cross-section evaluation in the International Reactor Dosimetry and Fusion File, new thermal neutron capture cross-section measurements, and recent advances in evaluation techniques have stimulated a revision of the International Reactor Dosimetry and Fusion File evaluation. The basic characteristics of the new evaluation are as follows: The evaluated thermal cross section is about 2.5 % higher than the value recommended by Mughabghab. In the resolved resonance region, the evaluated cross section is parameterized by the Reich-Moore formula without a background contribution. In the high-energy region, the evaluated values had been calculated using a PADE2 code on the basis of the experimental data and the results of theoretical model calculations. The new evaluation contains complete cross-section covariance information and provides a better agreement with both the differential and integral experimental cross-section data.
引用
收藏
页码:135 / 141
页数:7
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