RIBF Nuclear Physics Seminar

Erosion of N = 28 shell gap, shape coexistence and monopole transitions in the vicinity of 44S

Name: Erosion of N = 28 shell gap, shape coexistence and monopole transitions in the vicinity of 44S
Start: 2022-01-18T13:30:00+09:00
End: 2022-01-18T15:00:00+09:00
Location: No location set

by Masaaki Kimura (Hokkaido University)

Tuesday 18 Jan 2022, 13:30 → 15:00 Asia/Tokyo

Description

=Date and Place=

Jan. 18th(Tue) 2022 , 13:30~ via ZOOM meeting system

=Lecturer=

Prof. Masaaki Kimura

(Chief Scientist, Nuclear Many-body Theory Lab. RNC)

=Title=

Erosion of N = 28 shell gap, shape coexistence and monopole transitions in the vicinity of 44S

=Abstract=

In this study, we discuss the disappearance of the neutron magic number 28 and the subsequent shape coexistence in neutron-rich isotones, 40Mg, 42Si and 44S.

Numerical calculations by antisymmetrized molecular dynamics have shown that the 0+ states with different nuclear shapes coexist within small excitation energies. It has been found for the first time that the mixing ratios differ among the isotones, and that it is strongly reflected in the monopole transition strengths.