Broken seniority symmetry in the semimagic proton mid-shell nucleus 95Rh
Das, B., Cederwall, B., Qi, C., Górska, M., Regan P., H., Aktas, Ö., Albers H., M., Banerjee, A., Chishti M. M., R., Gerl, J., Hubbard, N., Jazrawi, S., Jolie, J., Mistry A., K., Nowacki, F., Polettini, M., Yaneva, A., Ahmed, U., Alhomaidhi, S., . . . Zhao, J. (2024). Broken seniority symmetry in the semimagic proton mid-shell nucleus 95Rh. Physical Review Research, 6(2), Article L022038. https://doi.org/10.1103/physrevresearch.6.l022038
Julkaistu sarjassa
Physical Review ResearchTekijät
Das, B. |
Qi, C. |
Gerl, J. |
Hall, O. |
Kahl, D. |
Kern, R. |
Kurz, N. |
Page, R. |
Si, M. |
Witt, W. |
Päivämäärä
2024Tekijänoikeudet
© 2024 the Authors
Lifetime measurements of low-lying excited states in the semimagic (N = 50) nucleus 95Rh have been performed by means of the fast-timing technique. The experiment was carried out using γ -ray detector arrays consisting of LaBr3(Ce) scintillators and germanium detectors integrated into the DESPEC experimental setup commissioned for the Facility for Antiproton and Ion Research (FAIR) Phase-0, Darmstadt, Germany. The excited states in 95Rh were populated primarily via the β decays of 95Pd nuclei, produced in the projectile fragmentation of a 850 MeV/nucleon 124Xe beam impinging on a 4 g/cm2 9Be target. The deduced electromagnetic E2 transition strengths for the γ -ray cascade within the multiplet structure depopulating from the isomeric Iπ =21/2+ state are found to exhibit strong deviations from predictions of standard shell model calculations which feature approximately conserved seniority symmetry. In particular, the observation of a strongly suppressed E2 strength for the 13/2+ → 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.
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Julkaisija
American Physical SocietyISSN Hae Julkaisufoorumista
2643-1564Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/213635903
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Lisätietoja rahoituksesta
This work was supported by the Swedish Research Council under Grants No. 621-2014-5558 and No. 2019-04880. We acknowledge support by the STFC under Grants No. ST/G000697/1, No. ST/P005314, No. ST/P003982/1, No. ST/P004598/1, and No. ST/V001027/1; by the UK Department for Business, Energy and Industrial Strategy via the National Measurement Office; by the BMBF under Grants No. 05P19RDFN1 and No. 05P21RDFN1; by the Helmholtz Research Academy Hesse for FAIR (HFHF); by the GSI F&E Grant No. KJOLIE1820; and by BMBF Grant 05P19PKFNA. G.H., M.S., and R.L. acknowledge IN2P3-GSI Agreements, ADI-IDEX, and CSC-UPS Grants. L.M.F. acknowledges the Spanish MICINN via Project No. RTI2018-098868-B-100. A.A. acknowledges partial support by the Ministerio de Ciencia e Innovacion Grant No. PID2019-104714GB-C21. J.V. acknowledges support by the Slovenian research agency Grant No. I0-0005. B.S.N.S acknowledges the financial support of the UKRI STFC through Grants No. ST/T001739/1 and No. ST/P005101/1. ...Lisenssi
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