Date: May 28, from 16:00
Place: RIKEN main building, room 213
Leturer: Masahiro Isaka (Hokkaido Univ.)
Title: Structure study of p-sd shell and neutron-rich $\Lambda$ hypernuclei by using AMD
Abstract:
In this talk, we will discuss the structure of several p-sd shell and
neutron-rich $\Lambda$ hypernuclei such as Be, Ne and Mg, based
on the antisymmetrized molecular dynamics (AMD) calculation.
Forthcoming experiments at J-PARC will reveal the spectroscopy
of sd-shell and neutron-rich $\Lambda$ hypernuclei. One of the
unique and interesting aspects of hypernuclei is the structure
change caused by hyperon. Through the interaction with surrounding
nucleons, a hyperon in the atomic nucleus can affect and modify
nuclear clustering and deformation. Especially, the structure
changes of sd-shell and neutron-rich $\Lambda$ hypernuclei are
of interest, since the various clustering and deformed structures
coexist in the ground and low-lying excited states.
To study such phenomena, we have extended the AMD for hypernuclei
and applied it. By using the YNG and Gogny D1S as effective $\Lambda$N
and NN interactions, we investigated the low-lying structure of Be, Ne and
Mg $\Lambda$ hypernuclei without any assumption on the clustering and
deformation. In this talk, we will show you the excitation spectra of such
$\Lambda$ hypernuclei and discuss the structure changes caused
by $\Lambda$ hyperon.