天体快中子俘获过程路径上的原子核β衰变寿命的研究

宇宙中重元素的起源是核物理与天体物理共同感兴趣的课题，其中快中子俘获过程（r-过程）负责产生一半左右的超铁元素。r-过程与极端不稳定原子核的性质紧密相关，其中β衰变寿命是r-过程的关键核物理输入量之一。由于r-过程路径上大多数原子核的性质仍无法从实验测得，因此需要依赖理论模型。本项目拟基于申请人在天体核合成、原子核β衰变寿命、协变密度泛函理论、无规相位近似等方面的工作基础，采用目前核物理中最为成功的理论之一——协变密度泛函理论，通过Bogoliubov变换处理对关联，考虑形变效应，发展超越平均场的质子-中子准粒子无规相位近似方法，研究天体r-过程路径上原子核的β衰变寿命性质，为了解宇宙中重元素起源提供可靠的核物理输入量。

The origin of heavy elements in the universe is an interesting topic in nuclear physics and astrophysics, the rapid neutron-capture process (r-process) is responsible for the production of about half of the elements heavier than iron. The rapid neutron-capture process (r-process) is closely related to the properties of extremely unstable nuclei, nuclear β-decay half-life is one of the key nuclear physics inputs of r-process. Since most of nuclei relevant for the r-process are still out of experimental reach, the theoretical predictions are inevitable for the studies of the r-process. Base on the research basis of the applicant in nucleosynthesis, nuclear β-decay half-lives, covariant density functional theory, and random phase approximation, employing one of the most successful theories in nuclear physics--the covariant density functional theory, including the pairing correlation using Bogoliubov transformation, considering the deformation effects, this project aim to develop the proton-neutron quasiparticle random phase approximation approach, investigate the beta-decay half-lives of nuclei on the r-process path, providing the reliable nuclear physics inputs for the studies on the origin of heavy elements in the universe.