Beta-Decay Spectroscopy of 96-99Kr

Abstract

Nuclear structure studies reveal the coexistence of many different shapes of the atomic nuclei. An interesting set of nuclei to study are found around neutron number N = 60, where a preferred oblate (disk shaped) nuclear structure of the neutron-rich Kr isobaric chain is interrupted and intruded by the deformation of Rb, Sr, Y, and Zr. Here a sharp transition is observed from oblate (disk shaped) to prolate (football shaped). Studying the beta-decay of Kr through gamma-ray spectroscopy at the Isotope Separator and Accelerator facility at TRIUMF will provide a deeper understanding of the nuclear structure of the Kr isobaric chain at A = 96, 97, 98, 99. This data was obtained during a discretionary beam time for the development of neutron-rich Kr beams while using the GRIFFIN array alongside 11 beta particle scintillators. Work done towards the data analysis of this data set will be described in this poster.