Radiative^(9)Be(n,γ0+1+2+3+4+5)^(10)Be reaction rate in the potential cluster model  

作　　者：S.B.Dubovichenko B.M.Yeleusheva N.A.Burkova A.S.Tkachenko 

机构地区：[1]Fesenkov Astrophysical Institute,050020 Almaty,Kazakhstan [2]Al-Farabi Kazakh National University,050040 Almaty,Kazakhstan

出　　处：《Chinese Physics C》2023年第8期81-94,共14页中国物理C（英文版）

基　　金：Supported by the Ministry of Science and Higher Education of the Republic of Kazakhstan(AP09259021)。

摘　　要：Within the framework of the modified potential cluster model with forbidden states,the total cross-sections of radiative n^(9)Be capture to the ground and five low-lying excited states are calculated at energies from 10^(-2)eV up to 5 MeV.The thermal cross-section σ_(th)=8.35mb is in good agreement with experimental data.We considered five resonances at the excitation energies E_(x)from 7.371 MeV up to 10.570 MeV corresponding to the following states with J^(π)(E_(x),MeV):3^(-)(7.371),2^(+)(7.542),3^(+)(9.4),2^(+)(9.56),and 3^(-)(10.570).The partial and total ^(9)Be(n,γ0+1+2+3+4+5)^(10)Be reaction rates are calculated at temperatures from 0.001 to 10 T_(9).Contrary to the available data,we propose that the rise in the reaction rate near factor five at T_(9)>1 is mainly due to the first 3^(-)(E_(R)=0.559 MeV)resonance.We foresee this contrast as arising from different model approaches.

关 键 词：n^(9)Be system total cross-sections thermonuclear capture rate cluster model nuclear astrophysics thermal and astrophysical energies. 

分 类 号：P14[天文地球—天体物理]