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Research on new magic number in nuclei with realistic nuclear interactions

具有真实核相互作用的原子核新幻数研究

基本信息

批准号：
15540280
负责人：
OKAMOTO Ryoji
金额：
$ 1.6万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

1.Results of the calculation of nuclei around ^<16>O1)We found that the calculated Coulomb interaction effect, Thomas-Ehrman shift, between ^<17>O and ^<17>F nuclei agrees fairy well with the experimental value for all the realistic nucleon-nucleon interactions employed in the present work.2)We found that the calculated single-particle energies in ^<15>O and ^<15>N nuclei are more attractive than the experimental values for all the realistic nucleon-nucleon interactions employed in the present work.3)We observed that the calculated spin-orbit splittings between the single-particle energies in ^<15>O and ^<15>N nuclei are smaller than the experimental values, though the difference between the calculated results and the experimental values depend on the nucleon-nucleon interactions employed in the calculation.4)We confirmed that effect of the three-body cluster terms on single-particle energies in nuclei around ^<24>O provides better agreement with the experimental values in contrast to the results without the effect.5)We found that the calculated results of single-particle energies in neutron-rich carbon nuclei are consistent with the experimental values.2.Results of the calculation of nuclei around ^<40>Ca1)We found that the calculated results of the ground-state energies in ^<40>Ca are consistent with the calculated results of nuclei around ^<16>O.2)We observed that the convergence of the calculated result of the ground-state energy in ^<40>Ca with respect to the size of the model space in the two-step decoupling method is not so fast, and we found that it is necessary to perform the calculation with the model space of larger size than that employed in the present calculation in order to obtain the quantitatively definite result.

1.对^O周围核的计算结果<16>1）我们发现，对于本文所采用的所有实际核子-核子相互作用，计算的^ O和^ F核之间的库仑相互作用效应，即Ehrman位移<17><17>，与实验值符合得相当好; 2）我们发现，对于本文所采用的所有实际核子-核子相互作用，计算的^<15>O和^<15>N核的单粒子能量比实验值更吸引人; 3）我们观察到，计算的^ O和^ N核的单粒子能量之间的自旋轨道分裂<15><15>较小结果表明，考虑三体集团项对^ O周围核的单粒子能量的影响，计算结果与实验值的符合程度要比不考虑三体集团项对^ O周围核的单粒子能量的影响<24>好得多。丰中子碳核中的粒子能量与实验值一致。2.^Ca周围核的计算<40>结果1）发现^ Ca中的基态能量的计算结果<40>与^O周围核的计算结果一致<16>。2）我们观察到两步退耦法计算^ Ca中的基态能量的结果<40>关于模型空间的大小收敛不是那么快，并且我们发现，为了定量地获得所需的能量，需要使用比本计算中所用的更大的模型空间来进行计算。明确的结果。