| Issue |
EPJ Web Conf.
Volume 342, 2025
14th International Spring Seminar on Nuclear Physics “Cutting-Edge Developments in Nuclear Structure Physics”
|
|
|---|---|---|
| Article Number | 01018 | |
| Number of page(s) | 8 | |
| DOI | https://doi.org/10.1051/epjconf/202534201018 | |
| Published online | 21 November 2025 | |
https://doi.org/10.1051/epjconf/202534201018
Origin of the electric hexadecapole isomer in 93Mo
1 Grand Accélérateur National d’Ions Lourds, CEA/DSM-CNRS/IN2P3, Bvd Henri Becquerel, BP 55027, F-14076 Caen, France
2 Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 21 November 2025
Abstract
We present a shell-model analysis of 93Mo to investigate the unusual behavior of its 21/2+ isomer - a prominent candidate for nuclear excitation by electronic capture. This state is unique as its decay is dominated by a slow electric hexadecapole E4 transition, while the typically much faster electric quadrupole E2 decay path is energetically forbidden. We investigate the microscopic origin of this phenomenon by examining in detail the structure of the wave functions of the initial and final states, and the E4 transition matrix elements. This analysis of 93Mo is contrasted with that of its particle-hole conjugate, 99Cd, where such an E4 transition is absent.
© The Authors, published by EDP Sciences, 2025
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