Speaker
Description
Nuclei around the rare earth transitional region (N ~ 90) present a variety of interesting nuclear features ranging from triaxiality, octupoles and shape coexistence. The proton rich nucleus 158Er (N = 90) lies at the boundary of the phase-transitional region, hence, it is likely to display of both transitional and deformed characteristics [1]. Properties of the low-lying states play a vital role in probing the structure of nuclei. However, the interpretation of the structure of the low-lying states in the rare earth, N ~ 90 region from previous studies was predominantly based on level spacing [1-5]. Although, it has been shown that energy spacings alone can be misleading [6]. Therefore, it has become evident that a larger set of precise experimental data for a variety of model-independent observables is necessary to constrain the interpretation of these excitations [7].
We shall report on the internal conversion coefficients, branching, and mixing ratios deduced from γ-e-, γ-γ coincident and, γ-γ angular correlation measurements following the β-decay of 158Tm using the GRIFFIN set up with its arsenal of ancillary detectors.
