Properties of microscopic nucleus-nucleus interaction for molecular resonance formation in 12 C + 12 C and 3 α + 3 α systems
Properties of microscopic nucleus-nucleus interaction for molecular resonance formation in 12 C + 12 C and 3 α + 3 α systems
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12 C + 12 C和3 α + 3 α系统中分子共振形成的微观核-核相互作用的性质
DOI：
10.1103/physrevc.63.064303
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发表时间：
2001
影响因子：
3.1
通讯作者：
Y. Hirabayashi
中科院分区：
文献类型：
--
作者：
M. Ito;Y. Sakuragi;Y. Hirabayashi
结合12 C+ 12 C和3 α+ 3 α分子共振的形成，讨论了两个12 C核之间微观相互作用势的性质.基于真实核子-核子相互作用（DDM 3 Y）和由3个α-RGM波函数计算的微观12 C跃迁密度，采用双重折叠方法计算了核-核相互作用.相互作用势可以写为从电子密度获得的电子部分和从密度的四极分量产生的多个部分的总和。我们分别讨论了势的单极部分和多极部分的作用。结果表明，在3 α+ 3 α结构的通道中，多极部分很强，并且由电子势产生的3 α+ 3 α分子带的能量位置发生了很大的改变.对具有12 C+ 12 C双核状结构的分子带的影响是中等的但不可忽略的，并且在很大程度上修改了弹性分子带和对齐非弹性分子带之间的带交叉图。研究了12 C+ 12 C通道（弹性通道、单激发通道和互激发通道）之间的通道耦合效应。由于12 C基态与2个1+态之间的强耦合，耦合通道计算得到的共振波函数比单通道共振波函数多了一个径向节点.所有的结果进行了讨论与带交叉模型，被认为是成功的描述12 C+ 12 C分子共振。
Properties of microscopic interaction potentials between two 12 C nuclei are discussed in connection with the formation of 12 C+ 12 C and 3 α+ 3 α molecular resonances. The nucleus-nucleus interactions are calculated by the double-folding procedure based on a realistic nucleon-nucleon interaction (DDM3Y) and microscopic 12 C transition densities calculated from 3α-RGM wave functions. The interaction potential can be written as the sum of the monopole part obtained from the monopole density and the multiple parts generated from the quadrupole component of the density. We discuss the role of the monopole and multipole parts of the potential separately. It is shown that the multipole part is very strong in the channels with 3 α+ 3 α structure and the energy positions of the 3 α+ 3 α molecular bands generated by the monopole potential are largely modified. The effect is moderate but non-negligible on the molecular bands with the 12 C+ 12 C dinuclearlike structure and largely modifies the band crossing diagram between the elastic and aligned-inelastic molecular bands. The channel coupling effect among the 12 C+ 12 C channels, namely, the elastic channel and the single-and mutual-2 1+ excitation channels is also investigated. Due to the strong coupling between the ground and 2 1+ states of 12 C, the resonance wave functions obtained by the coupled-channel calculation have an additional radial node compared with those of the single-channel resonances. All the results are discussed in connection with the band crossing model which was believed to be successful in describing the 12 C+ 12 C molecular resonances.