Reaction rate of radiative p12C capture in a modified potential cluster model  

作　　者：S.B.Dubovichenko N.A.Burkova A.S.Tkachenko A.Samratova 

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

出　　处：《Chinese Physics C》2025年第4期101-112,共12页中国物理C(英文版)

基　　金：Carried out within Project No.AP19676483«Study of hydrogen thermonuclear fusion processes in the CNO cycle in the Sun and in stars»,supported by the Ministry of Science and Higher Education of the Republic of Kazakhstan.

摘　　要：The astrophysical S-factor of the ^(12)C(p,γ_(0))^(13)N reaction at energies from 25 keV to 5 MeV within the framework of a modified potential cluster model with forbidden states is considered.The experimental phase shifts resonant δ_(2)_(S_(1/2)),δ_(2)_(S_(3/2)),and non-resonant δ_(2)_(D_(3/2)) at the energies up to E_(c.m.)=3 MeV are reproduced with high accuracy,which provides the appropriate agreement with the experimental data for the S-factor of 1950-2023 years.Two sets of asymptotic constant are used:Set I refers to C_(w)=1.30(2),and Set II refers to C_(w)=1.37(1).Set I leads to the astrophysical factor S(25)=1.34±0.02 keV-b,which is in agreement with data by Skowronski et al.,2023-1.34±0.09 keV-b;Set II gives S(25)=1.49±0.02 keV-b,which is in agreement with data by Kettner et al.,2023-1.48±0.09 keV-b.The reaction rates of ^(12)C(p,γ_(0))^(13)N at temperatures T_(9) from 0.001 to 10 are calculated.The detailed comparison with some models,the R-matrix approach,and NACRE II data for reaction rates is considered.

关 键 词：radiative proton capture elastic phase shifts astrophysical S-factor reaction rate modified potential model 

分 类 号：O571.1[理学—粒子物理与原子核物理]