【摘要】 在唯象模型的基础上,考虑到碰撞氘核的D态分量对跃迁矩阵元的贡献和4He基态D态成分,我们从理论上计算了低能d(d,γ)α反应的天体物理学S因子．由理论计算再现d-d系统的结合能和以及由共振群方法计算的d-d弹性散射相移,得到Woods-Saxon势参数．并由此计算的S因子与实验数据在 Ec．m.<3MeV范围符合得较好,尤其在天体物理学感兴趣的几百keV以下能区,理论计算结果很好地符合实验数据．由理论计算结果外推,计算了目前还没有实验数据的使恒星核合成反应过程能够进行的恒星能区(约1-20keV)的S因子．更多还原

【Abstract】 We study one of the most important reactions 2H(d,γ)4He with an astrophysical interest. A phenomeno logical model is adopted where the D-state component of the colliding deuterons and D-components in 4He ground state are considered. Woods-Saxon potential parameters are obtained by reproducing the binding energy of d-d system and d-d elastic scattering phase shifts calculated by the resonating group method. A comparison of theoretical results with the experiment data is made at the energy range Ec.m. < 3MeV. In particular, rather good agreement with the experiment data of the astrophysical 5-factor can be obtained below 500keV. Due to the lack of experiment data at the energies around 0-20keV required in the investigation of the stellar nucleosynthesis, an theoretical extrapolation of the S-factor down to stellar energies is performed.更多还原