Beyond mean-field description of nuclear collective vibration and its new excitation possibility

Seminars

Bogoliubov Laboratory of Theoretical Physics

Low Energy Nuclear Physics Seminar

Date and Time: Tuesday, 8 July 2025, at 11:00 AM

Venue: Blokhintsev Lecture Hall, Bogoliubov Laboratory of Theoretical Physics

Seminar topic: “Beyond mean-field description of nuclear collective vibration and its new excitation possibility”

Speaker: Yifei Niu (Lanzhou University)

Abstract:

Nuclear collective vibration provides deep insight in understanding the origin of heavy elements in the universe as well as the nuclear equation of state (EoS). For example, the Gamow-Teller transitions determine the beta-decay half-lives as important inputs for the nucleosynthesis study, while the giant monopole resonance(GMR) provides direct constraints on nuclear incompressibility, a key parameter of nuclear EoS. The quasiparticle random phase approximation model is the most commonly used microscopic model to study the collective vibration of atomicnuclei. However, due to the lack of higher-order many-body correlations beyondthe mean field, the resonance width cannot be given, and serious problems are encountered when describing beta-decay lifetime and GMR energies. In this talk, the author will introduce how to solve the above problems by developing a quasiparticle random phase approximation + quasiparticle vibration coupling model which considers higher-order many-body correlations. Furthermore, facing to various modes of nuclear collective vibrations, I will discuss new possibilities to excite different modes of nuclear collective vibrations with vortex particles.