Photoneutron cross sections for Mo isotopes: A step toward a unified understanding of (γ,n) and (n,γ) reactions
Photoneutron cross sections for Mo isotopes: A step toward a unified understanding of (γ,n) and (n,γ) reactions
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DOI：
10.1103/physrevc.88.015805
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发表时间：
2013-07
影响因子：
3.1
通讯作者：
H. Utsunomiya;S. Goriely;T. Kondo;C. Iwamoto;H. Akimune;T. Yamagata;H. Toyokawa;H. Harada;F. Kitatani;Y. Lui;A. Larsen;M. Guttormsen;P. Koehler;S. Hilaire;S. Péru;M. Martini;A. Koning
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文献类型：
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作者：
H. Utsunomiya;S. Goriely;T. Kondo;C. Iwamoto;H. Akimune;T. Yamagata;H. Toyokawa;H. Harada;F. Kitatani;Y. Lui;A. Larsen;M. Guttormsen;P. Koehler;S. Hilaire;S. Péru;M. Martini;A. Koning
用准单色激光-康普顿散射γ射线测量了94 Mo、95 Mo、96 Mo、97 Mo、98 Mo和100 Mo在中子阈值附近的光中子截面。用Skyrme Hartree-Fock-Bogoliubov（HFB）+准粒子无规相近似（QRPA）模型和轴向形变Gogny HFB + QRPA模型对E1 γ射线强度进行了分析。本文将现有的光中子数据约束下的γ射线强度函数与核共振荧光数据或更新的奥斯陆数据相结合，对中子阈下的数据进行补充，在有测量数据的情况下，对反（n，γ）截面进行了全面的分析。奥斯陆的数据和相应的不确定性更新的基础上的s波中子间距和平均辐射宽度，特别是为96 Mo确定的最新结果。最后，用γ射线强度函数方法计算了93 Mo和99 Mo两个放射性核的辐射中子俘获截面。© 2013美国物理学会。
Photoneutron cross sections were measured for 94Mo, 95Mo, 96Mo, 97Mo, 98Mo, and 100Mo near the neutron threshold with quasi-monochromatic laser-Compton scattering γ rays. The photoneutron data were analyzed with the Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and the axially symmetric-deformed Gogny HFB plus QRPA model of E1 γ-ray strength. Combining the γ-ray strength function constrained by the present photoneutron data with either the nuclear resonance fluorescence data or the updated Oslo data to supplement the data below the neutron threshold, a thorough analysis of the reverse (n,γ) cross sections is made whenever measurements are available. The Oslo data and the corresponding uncertainties are updated based on the latest results of the s-wave neutron spacing and the average radiative width determined in particular for 96Mo. Finally, radiative neutron capture cross sections for two radioactive nuclei, 93Mo and 99Mo, are deduced with the γ-ray strength function method. © 2013 American Physical Society.