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Abstract
摘要 |
In this talk I would like to give a brief review on our recent studies regarding the seniority structure of nuclei around 100Sn. I will firstly introduce the status of the shell-model configuration interaction approach and its possible truncation algorithms. I will then discuss the collectivity properties in Sn and Te isotopes and the possible role played by the cross-shell excitation and the quadrupole-quadrupole correlation. In particular, I will also show that the seniority symmetry is dynamically conserved in j=9/2 shells irrespective of type of interaction. This may be a unique phenomenon for nuclear physics, which is characterized by large spin-orbit coupling. Moreover, I will show for systems with equal number of protons and neutrons, the seniority coupling is broken and, as a result, a new form of spin-aligned proton-neutron pair coupling is favored. The effect of such couplings on alpha and other decay properties will also be discussed. |
