guest ::
| Home > Publications database > Broken seniority symmetry in the semimagic proton mid-shell nucleus $^{95}$Rh |
| Journal Article | GSI-2025-00072 |
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
2024
APS
College Park, MD
Please use a persistent id in citations: doi:10.1103/PhysRevResearch.6.L022038 doi:10.15120/GSI-2025-00072
Abstract: Lifetime measurements of low-lying excited states in the semimagic ($N = 50$) nucleus $^{95}$Rh have been performed by means of the fast-timing technique. The experiment was carried out using $\gamma$-ray detector arrays consisting of LaBr$_3$(Ce) scintillators and germanium detectors integrated into the DESPEC experimental setup commissioned for the Facility for Antiproton and Ion Research ({\sc fair}) Phase-0, Darmstadt, Germany. The excited states in $^{95}$Rh were populated primarily via the $\beta$ decays of $^{95}$Pd nuclei, produced in the projectile fragmentation of a 850 MeV/nucleon $^{124}$Xe beam impinging on a 4 g/cm$^2$ $^9$Be target. The deduced electromagnetic E2 transition strengths for the $\gamma$-ray cascade within the multiplet structure depopulating from the isomeric $I^\pi = 21/2^+$ state are found to exhibit strong deviations from predictions of standard shell model calculations which featureapproximately conserved seniority symmetry. In particular, the observation of a strongly suppressed E2 strength for the $13/2^+ \rightarrow 9/2^+$ ground state transition cannot be explained by calculations employing standard interactions.This remarkable result may require revision of the nucleon-nucleon interactions employed in state-of-the-art theoretical model calculations, and might also point to the need for including three-body forces in the Hamiltonian.
- ddc:530
Note: The results presented here are based on the experiment S480, which was performed at the target station HFS at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany) in the frame of FAIR Phase-0.""Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distributionof this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by Bibsam"
Contributing Institute(s): Research Program(s):
- 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
- FAIR Phase-0 - FAIR Phase-0 Research Program (GSI-FAIR-Phase-0) (GSI-FAIR-Phase-0)
Appears in the scientific report 2024
Database coverage:
; 
; 
; 
; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF < 5 ; JCR ; SCOPUS ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
PDF (PDFA)