Topics (报告题目): Cluster approach to the structure of heavy nuclei
Speakers (报告人): Dr. Timur Shneydman (Joint Institute of Nuclear Research, Dubna, Russia)
Date (时间): 2016年11月28日（周一）上午10:00 – 11:00
Place (地点): 北京大学加速器楼408室
Contact Person (联系人): 华辉（Hhua@pku.edu.cn)
We developed a cluster model which allows taking into account both shape deformation parameters and cluster degrees of freedom. In the proposed model the mass asymmetry variable which describes the partition of nucleons between the clusters is used as a collective coordinate. Due to this the wave function of the nucleus is treated as a superposition of different cluster configurations including the mononucleus.
The model is applied to describe the multiple negative-parity bands in the deformed actinides.To describe the reflection asymmetric collective modes characterized by the nonzero values of K, the degrees of freedom related to the internal excitation of clusters are taken into account. The observed excitation spectra and angular-momentum dependencies of the parity splitting and electromagnetic transition probabilities are explained for different isotopes of Ra, Th, U, and Pu.