A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Broken seniority symmetry in the semimagic proton mid-shell nucleus 95Rh (2024)

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

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Das, B.; Cederwall, B.; Qi, C.; Górska, M.; Regan P., H.; Aktas, Ö.; Albers H., M.; Banerjee, A.; Chishti M. M., R.; Gerl, J.; et al.

Lehti tai sarja: Physical Review Research

eISSN: 2643-1564

Julkaisuvuosi: 2024

Ilmestymispäivä: 10.05.2024

Volyymi: 6

Lehden numero: 2

Artikkelinumero: L022038

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/physrevresearch.6.l022038

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/95181

Tiivistelmä

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.

YSO-asiasanat: ydinfysiikka; hiukkasfysiikka

Vapaat asiasanat: accelerators & beams; nuclear physics; nuclear structure & decays

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Alustava JUFO-taso: 1