Structure of Krypton Isotopes using the Generalised Bohr Hamiltonian Method

Abstract

We investigate the properties of the excited spectra of the even-even isotopes of krypton using a Generalised Bohr Hamiltonian with three different Skyrme functionals. In particular, we investigate the evolution of the low-lying $2_1^{+}$ and $4_1^{+}$ states and their associated electromagnetic transitions. The model reproduces quite nicely the energy trends apart from ${}^{88}$Kr, where none of the interactions used here are able to grasp a sudden change in the energy spectrum. Additionally, we explore the neutron deficient region ${}^{72-76}$Kr which is a proposed region for shape coexistence. We observe that the model can reproduce the structure of the experimental spectrum of ${}^{72}$Kr exceedingly well.

Comments: Presented at the 27th International Nuclear Physics Conference (INPC) 2019, Glasgow, Scotland, UK, 29th July - 2 August