Negative-Parity States and beta-decays in odd Ho and Dy Nuclei with A=151,153

TL;DR

This paper investigates negative-parity states and beta-decays in odd Ho and Dy nuclei with A=151,153 using the IBFM-2 model, providing spin assignments, energy levels, transition rates, and decay properties consistent with experimental data.

Contribution

The study applies the IBFM-2 model to assign spins and calculate properties of negative-parity states and beta-decays in specific odd nuclei, enhancing understanding of their structure.

Findings

Calculated excitation energies agree with experimental data.

Electromagnetic transition rates match observed values.

Beta-decay log ft values are close to experimental measurements.

Abstract

We have investigated the negative-parity states and electromagnetic transitions in $^{151,153}$Ho and $^{151,153}$Dy within the framework of the interacting boson fermion model 2 (IBFM-2). Spin assignments for some states with uncertain spin are made based on this calculation. Calculated excitation energies, electromagnetic transitions and branching ratios are compared with available experimental data and a good agreement is obtained. The model wave functions have been used to study $\beta$-decays from Ho to Dy isotones, and the calculated $\log ft$ values are close to the experimental data.