Shell model calculation for medium-heavy nuclei based on effective interaction derived from the VS-IMSRG method

5 Mar 2025, 15:29
1m
Main Lecture Hall (University of Aizu)

Main Lecture Hall

University of Aizu

90 Kamiiawase, Tsuruga, Itsukimachi, Aizu-Wakamatsu, Fukushima, 965-0006 Japan.

Speaker

Takumi Shoji (University of Tsukuba)

Description

We have investigated the nuclear structure properties of the medium-heavy nucleus like Cd isotopes in the framework of the nuclear shell model.
We have used the ab initio shell model Hamiltonian from the in-medium Similarity Renormalization Group (IMSRG) approach.
Here, two types of IMSRG approaches have been used, namely IMSRG(2) and a factorized approximation of IMSRG(3).
In this work, using these approaches we calculated 2 neutron separation energies, excitation energies and some other physical quantities.
In our analysis, we have found that the IMSRG(2) approach overestimates the 2+ excitation energies of the Cd isotopes about two factor than experimental one.
On the other hands, a factorized approximation of IMSRG(3) has been developed, which reproduces the 2+ excitation energies of Cd isotopes more reasonable than IMSRG(2) approach.
We will discuss our recent shell model results of nuclear structure properties of medium-heavy nucleus in comparison with experimental data and also discuss the origin of difference between the two ab initio approaches IMSRG(2) and IMSRG(3).

Type of contribution poster
Are you a student or postdoc? yes

Primary author

Takumi Shoji (University of Tsukuba)

Co-authors

Noritaka Shimizu (University of Tsukuba) Takayuki Miyagi (University of Tsukuba)

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