【作者】 许甫荣；

【Author】 XU Fu-Rong(MOE Key Laboratory, School of Physics, Peking University , Beijing 100871, China)(Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Physics, Lanzhou 730000, China) (Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China)

【机构】 北京大学物理学院重离子物理教育部重点实验室；

【摘要】 用推转壳模型计算研究了原子核的高速转动运动及其结构特性.讨论了A-50区核的转动特性;A-80区(N=Z)核的形状共存问题;A-110区丰中子核的扁椭球形变的稳定性.基于壳模型理论,我们用限制组态绝热堵塞方法计算讨论了A-130,180和超重核区的高角动量同核异能态,系统预言了高角动量多准粒子态的存在,并指出这些核态可以有较长的寿命,这对于不稳定核的研究是很有帮助的.计算解释了不少典型的实验观测,一些理论预言已经被最近的实验证实.更多还原

【Abstract】 We used the cranking shell model to investigate the high-spin motions and structures of atomic nuclei. We focus the collective rotations of the A-50, 80 and 110 nuclei. The A-50 calculations show complicated g spectroscopy, which can have significant vibration effects. The A≈80 N≈Z nuclei show rich shape coexistences with prolate and oblate rotational bands. The A ≈110 nuclei near the r -process path can have well-deformed oblate shapes that become yrast and more stable with increasing rotational frequency. As another important investigation, we used the configuration-constrained adiabatic method to calculate the multi-quasiparticle high- K states in the A-130, 180 and superheavy regions. The calculations show significant shape polarizations due to quasi-particle excitations for soft nuclei, which should be considered in the investigations of high- K states. We predicted some important high-K isomers, e.g., the 8-isomers in the unstable nuclei of 140Dy and 188Pb , which have been confirmed in experiments. In superheavy nuclei, our calculations show systematic existence of high-K states. The high-K excitations can increase the productions of synthesis and the survival probabilities of superheavy nuclei.更多还原