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首页> 外文期刊>Journal of Basic and Applied Physics >Application of Neutron Activation Techniques for the Measurement of 238U (n, γ) and 238U (n, 2n) Cross Section at Neutron Energies of 13.5 and 17.28 MeV
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Application of Neutron Activation Techniques for the Measurement of 238U (n, γ) and 238U (n, 2n) Cross Section at Neutron Energies of 13.5 and 17.28 MeV

机译：中子活化技术在测量13.5 MeV和17.28 MeV的中子能时测量238U（n，γ）和238U（n，2n）截面的应用

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摘要

The (n, γ) and (n, 2n) reaction cross-section of 238U at average neutron energies of 13.5 and 17.28 MeV from the 7Li(p, n)7Be reaction has been determined using activation and off-line γ–ray spectrometric technique. The experimentally determined 238U(n, γ)239U and 238U(n, 2n)237U reaction cross-sections from present work were compared with the evaluated data of ENDF/BVII.0 and JENDL-4.0, JEFF-3.1/A and CENDL-3.1 (referenced in text). The experimental values were found to be in general agreement with the evaluated values obtained using ENDF/BVII.0, JENDL-4.0 and JEFF-3.1/A but it differs with the values obtained using CENDL-3.1. The present data along with literature data in a wide range of neutron energies were interpreted in terms of competition between 238U(n, γ), (n, f), (n, nf) and (n, xn) reactions channels. The 238U(n, γ) and 238U(n, 2n) reaction cross-sections were also calculated theoretically using the TALYS 1.4 computer code and were found to be in general agreement with the experimental data.
机译：使用活化和离线γ射线光谱法测定了来自7Li（p，n）7Be反应的中子平均能量为13.5和17.28 MeV时238U的（n，γ）和（n，2n）反应截面技术。将本实验中实验确定的238U（n，γ）239U和238U（n，2n）237U反应截面与ENDF / BVII.0和JENDL-4.0，JEFF-3.1 / A和CENDL- 3.1（在文本中引用）。发现实验值与使用ENDF / BVII.0，JENDL-4.0和JEFF-3.1 / A获得的评估值基本一致，但是与使用CENDL-3.1获得的值不同。根据238U（n，γ），（n，f），（n，nf）和（n，xn）反应通道之间的竞争解释了当前数据以及广泛中子能量中的文献数据。 238U（n，γ）和238U（n，2n）的反应截面在理论上也使用TALYS 1.4计算机代码计算得出，并且与实验数据基本一致。

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