双团簇模型中A=7等压线的电磁响应
Electric and magnetic response to the continuum for A=7 isobars in a dicluster model
摘要：
在双团簇模型中研究了镜像同量异位素$^7$ Li和$^7$ Be.在此框架下计算了磁偶极矩和磁偶极子对连续介质的响应。磁的贡献被发现是小的电偶极子和四极激发，即使在天体物理能量，在与氘的情况下的差异。能量加权分子求和规则的评价和分子磁偶极子求和规则的公式被发现，这符合数值计算。光解离和辐射捕获的横截面以及天体物理意义的反应的S-因子的计算与已知的实验数据吻合良好。
英文摘要：
Mirror isobars $^7$Li and $^7$Be are investigated in a dicluster model. The magnetic dipole moments and the magnetic dipole response to the continuum are calculated in this framework. The magnetic contribution is found to be small with respect to electric dipole and quadrupole excitations even at astrophysical energies, at a variance with the case of deuteron. Energy weighted molecular sum rules are evaluated and a formula for the molecular magnetic dipole sum rule is found which matches the numerical calculations. Cross-sections for photo-dissociation and radiative capture as well as the S-factor for reactions of astrophysical significance are calculated with good agreement with known experimental data.
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