55. International Winter Meeting on Nuclear Physics

The first signs of collectivity in the nuclei above 132Sn core

Not scheduled

3m

Bormio, Italy

Poster

Speaker

Dr Houda NAIDJA (Université Constantine 1)

Description

The mass region above ${}^{132}$Sn inert closed core represents an interesting area for experimental and theoretical nuclear structure research. In our earlier shell-model works, we have calculated the energy levels, the isomeric transitions and the masses of ${}^{134,136,138,140}$Sn. We have progressed in our investigation of this region by describing the low-lying spectra, E2 and M1 transition strengths of even-even chain of nuclei with $52\le Z\le 60$ and $82\le N\le 86$ using an effective interaction based on the N3LO portential (named N3LOP). We focus in the discussion on the collectivity in the $N=86$ isotones, where the quadrupole properties sign the presence of triaxial $\gamma$ bands.