基于r过程的重要丰中子原子核结构特性的研究

投影壳模型是研究原子核微观结构，特别是形变中重原子核结构的重要模型。然而，随着国内外大科学装置的建成及投入使用以及人们对远离β稳定线原子核、核天体物理中r过程研究的深入，丰中子核结构的信息愈显缺乏，须相应地将投影壳模型进行推广和完善。本项目计划就人们关心的与r过程相关的丰中子核结构问题进行研究，具体地：1）利用投影壳模型对质量数为100-110区丰中子核结构进行研究，重点研究原子核能隙的变化及壳结构的演化；2）扩展三轴投影壳模型程序获得对丰中子核集体运动特性的一般描述；3）发展计算电磁跃迁的三轴投影壳模型程序，探索K同核异能态可能的退激路径，为潜在的应用研究奠定理论基础;4）加强理论与实验的合作，力争在某些研究内容上有重点突破。

The projected shell model is an important model for the nuclear structure study, especially the structure of deformed nuclei in median to heavy mass regions. Due to the current interest in the nuclear properties of nuclei far away from the βstable line and the further investigation on the r process of nuclear astrophysics with the large-scale scientific facility completed and applied, it is necessary to further generalize and develop the model. In this project, we plan to study nuclear structure of neutron-rich nuclei related to the r process, specially, 1) applying the projected shell model to study the structure of neutron-rich nuclei in the 100-110 mass region, especially the variation of energy gap and the evolution of shell structure ; 2) to extend the triaxial projected shell model to the collective motion of neutron-rich nuclei; 3) to construct the program of triaxial projected shell model on electromagnetic transition, explore the possible deexcitation path and lay a theoretical foundation for potential applied research;4)to enhance cooperation between theory and experiment and aim to obtain important breakthrough on some studies.