The ground bands and β-bands of four nuclei 230,232Th and 232,234U in the actinide region are investigated by introducing a collective Do pair into the projected shell model.We discuss the collectivity of the Do pair...The ground bands and β-bands of four nuclei 230,232Th and 232,234U in the actinide region are investigated by introducing a collective Do pair into the projected shell model.We discuss the collectivity of the Do pair.The calculated energy schemes agree well with experimental data,and so do the E2 transition rates.展开更多
We perform level statistics of the Nilsson single-particle levels. The effects of the l2 and l ＆#12539; s; s terms are discussed as well as their interplay with the deformations. The results show that when the l2 ter...We perform level statistics of the Nilsson single-particle levels. The effects of the l2 and l ＆#12539; s; s terms are discussed as well as their interplay with the deformations. The results show that when the l2 term is added to the harmonic oscillator potential, chaotic motion occurs. The strength ranges of the l2 term in which chaotic motion exists are related to the deformation of the harmonic oscillator potential. The calculations of the localization length in different bases demonstrate that it is the spherical or axial symmetries that govern the chaotic motion. The degree of chaoticity increases significantly with the l ＆#12539; s; s term included.展开更多
基金Supported by National Natural Science Foundation of China(No 10975116),the Program for New Century Excellent Talents in University(No NCET-07-0730)the Fundamental Research Funds for the Central Universities under Contract No 2010121011.
文摘The ground bands and β-bands of four nuclei 230,232Th and 232,234U in the actinide region are investigated by introducing a collective Do pair into the projected shell model.We discuss the collectivity of the Do pair.The calculated energy schemes agree well with experimental data,and so do the E2 transition rates.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10605018, 10975116 and 10675170, the Program for New Century Excellent Talents in University （NCET-07-0730）, and the National Basic Research Program of Chin under Grant No 2007CB815003.
文摘We perform level statistics of the Nilsson single-particle levels. The effects of the l2 and l ＆#12539; s; s terms are discussed as well as their interplay with the deformations. The results show that when the l2 term is added to the harmonic oscillator potential, chaotic motion occurs. The strength ranges of the l2 term in which chaotic motion exists are related to the deformation of the harmonic oscillator potential. The calculations of the localization length in different bases demonstrate that it is the spherical or axial symmetries that govern the chaotic motion. The degree of chaoticity increases significantly with the l ＆#12539; s; s term included.
