2024/05/22 by Dhananjaya Sahoo, A. Y. Deo, Sahoo, Dhananjaya +31
Engineering · Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics
paper · pdf · doi:10.48550/arxiv.2405.13856
openalex publication_date 2024/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
High-spin states in the transitional 217Ac nucleus are established up to 3.8 MeV excitation energy and Iπ = 41/2+ with the addition of around 20 new transitions. The structure of the yrast and near-yrast states below the 29/2+ isomer is revisited. The inconsistencies in the level schemes reported earlier are resolved. The level structure above the 29/2+ isomer is established for the first time. Large-basis shell-model calculations with the KHPE interaction are performed to compare the experimentally observed level energies with the theoretical predictions. A comparison with the systematics of the N = 128 isotones suggests that the yrast structures result from a weak coupling of the odd proton to the even-even 216Ra core, which is consistent with the shell-model configurations. Furthermore, alpha decay of the 29/2+ isomer is revisited and the decay scheme established from this work is discussed in the framework of the shell model.