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Influence of resonances on the 11B(n,γ)12B capture reaction rate. Capture to the ground state of 12B
Astroparticle Physics ( IF 3.5 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.astropartphys.2020.102481
S.B. Dubovichenko , N.A. Burkova , A.V. Dzhazairov-Kakhramanov , A.S. Tkachenko

Within the framework of the modified potential cluster model with a classification of orbital states according to Young diagrams, the possibility of describing experimental data for total cross sections of the neutron radiative capture on 11B to the ground state of 12B at energies of 10 meV (1 meV = 10-3 eV) to 7 MeV was considered. It was shown that, taking into account only the E1 transition from the S state of the n11B scattering to the ground state of 12B, it is quite possible to explain the magnitude of the known experimental cross sections at energies of 25.3 meV to 70 keV. Furthermore, on the basis of the total cross sections of 10 meV to 7 MeV, but excluding resonances above 5 MeV, the reaction rate is calculated in the temperature range of 0.01 to 10.0 T9. It is shown that the inclusion of low-lying resonance states makes a significant contribution to the reaction rate, starting already with temperatures of 0.2-0.3 T9.

中文翻译:

共振对 11B(n,γ)12B 捕获反应速率的影响。捕获到 12B 的基态

在根据杨氏图对轨道状态进行分类的修正势簇模型的框架内,描述 11B 中子辐射捕获总截面到 12B 基态的实验数据的可能性,能量为 10 meV (1 meV = 10-3 eV) 到 7 MeV 被考虑。结果表明,仅考虑从 n11B 散射的 S 态到 12B 基态的 E1 跃迁,很有可能解释能量为 25.3 meV 到 70 keV 时已知实验截面的大小。此外,基于 10 meV 至 7 MeV 的总截面,但不包括高于 5 MeV 的共振,在 0.01 至 10.0 T9 的温度范围内计算反应速率。
更新日期:2020-12-01
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