弱束缚原子核的形变及相关问题的进一步研究

This project will closely incorporate with the latest progresses in experiment performed on the large research infrastructure both in and out of the country. The projected shell model(PSM) will be carried out to investigate the deformation and relative issue of the weakly bound nuclei. We will study the excited energy, microstructure and the electric-magnetic transition rate as well as decay rate of isomeric sates with long life and high spin. The appropriate nuclei which are used to trigger the isomer to release the energy will be explored in high K isomer region.The structure of neutron-rich nuclei with strong deformation will be considered especially the structure of odd-A and odd-odd nuclei which are rare studied by theoretical work. The nuclear excited energy, electric-magnetic transition and g factors in this mass region will be included in our calculations. We will apply the triaxial projected shell model (TPSM) to further discuss the triaxial deformation and multi-phonon vibrational bands of Mo、Ru、Rh isotopes chain in A=110 region. In order to obtain the interplay information between quasiparticle (qp) bands and multi-phonon vibrational bands, we will extend the TPSM code to calculate the excited energy, electric-magnetic transition of yrast, multi-phonon vibrational and multi-qp bands of nuclei with triaxial deformation by constructing the program of negative-parity bands and including quasiparticle from two shells. By improving the current model, we expect that the model can give the self-consistent description in describing the nuclei near and far away from the stable line. In addition, we will enhance the cooperation with the experimental scientist and provide more theoretical information.

本项目密切结合国内外大科学装置上最新的实验进展，利用投影壳模型研究弱束缚原子核的形变和相关问题。研究高自旋、长寿命的同核异能态的激发能、它们的微观结构、以及它们的电磁跃迁和衰变几率等问题；在高K-同核异能态的核区寻找适合用于触发释放同核异能态中能量的原子核。研究具有大形变的丰中子核的结构性质，特别是理论研究还不多的奇A核、奇奇核的结构性质。计算该核区原子核的激发能，电磁跃迁，g因子等；利用三轴投影壳模型进一步研究A=110核区Mo、Ru、Rh等同位素链的三轴形变及多声子振动带。将三轴投影壳模型发展为准粒子取自两个主壳，并建立负宇称带的计算程序，研究三轴形变原子核的晕带、多声子振动带和多准粒子带的激发能、带内带间的电磁跃迁，获得准粒子带与多声子振动带的相互作用信息。通过研究，改进和发展现有的模型，以求对稳定线附近和远离稳定线的原子核能比较自洽的统一描述，并与实验家合作，为实验提供更多参考。

本项目按研究计划，密切结合国内外大科学装置上最新的实验进展，利用投影壳模型研究弱束缚原子核的形变和相关问题。研究高自旋、长寿命的同核异能态的激发能、它们的微观结构、以及它们的电磁跃迁和衰变几率等问题；研究过渡核区原子核结构演化；在高K-同核异能态的核区寻找适合用于触发释放同核异能态中能量的原子核。研究具有大形变的丰中子核的结构性质。计算该核区原子核的激发能，电磁跃迁等；利用三轴投影壳模型进一步研究A=100-110核区一些同位素链的三轴形变及多声子振动带。研究三轴形变原子核的晕带、多声子振动带和多准粒子带的激发能、带内带间的电磁跃迁，获得准粒子带与多声子振动带的相互作用信息。重新审查了壳模型的有效相互作用的单极部分。通过研究，改进和发展了现有的模型，对稳定线附近和远离稳定线的原子核能比较自洽的统一描述，并与实验家合作，为实验提供更多参考。