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
Published in
Physical Review ResearchAuthors
Das, B. |
Qi, C. |
Gerl, J. |
Hall, O. |
Kahl, D. |
Kern, R. |
Kurz, N. |
Page, R. |
Si, M. |
Witt, W. |
Date
2024Copyright
© 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.
...
Publisher
American Physical SocietyISSN Search the Publication Forum
2643-1564Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/213635903
Metadata
Show full item recordCollections
Additional information about funding
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. ...License
Related items
Showing items with similar title or keywords.
-
Nature of seniority symmetry breaking in the semimagic nucleus 94Ru
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.; Polettini, M.; Yaneva, A.; Alhomaidhi, S.; Zhao, J.; Arici, T.; Bagchi, S.; Benzoni, G.; Boutachkov, P.; Davinson, T.; Dickel, T.; Haettner, E.; Hall, O.; Hornung, Ch.; Hucka, J. P.; John, P. R.; Kojouharov, I.; Knöbel, R.; Kostyleva, D.; Kuzminchuk, N.; Mukha, I.; Plass, W. R.; Nara Singh, B. S.; Vasiljević, J.; Pietri, S.; Podolyák, Zs.; Rudigier, M.; Rösch, H.; Sahin, E.; Schaffner, H.; Scheidenberger, C.; Schirru, F.; Sharma, A.; Shearman, R.; Tanaka, Y.; Vesić, J.; Weick, H.; Wollersheim, H. J.; Ahmed, U.; Algora, A.; Appleton, C.; Benito, J.; Blazhev, A.; Bracco, A.; Bruce, A. M.; Brunet, M.; Canavan, R.; Esmaylzadeh, A.; Fraile, L. M.; Häfner, G.; Heggen, H.; Kahl, D.; Karayonchev, V.; Kern, R.; Korgul, A.; Kosir, G.; Kurz, N.; Lozeva, R.; Mikolajczuk, M.; Napiralla, P.; Page, R.; Petrache, C. M.; Pietralla, N.; Régis, J.-M.; Ruotsalainen, P.; Sexton, L.; Sanchez-Temble, V.; Si, M.; Vilhena, J.; Werner, V.; Wiederhold, J.; Witt, W.; Woods, P. J.; Zimba, G. (American Physical Society (APS), 2022)Direct lifetime measurements via γ−γ coincidences using a fast timing detector array consisting of LaBr3(Ce) scintillators has been applied to determine the lifetime of low-lying states in the semimagic (N=50) nucleus 94Ru. ... -
Low-spin excitations in the 109Tc nucleus
Kurpeta, Jan; Urban, W.; Płochocki, A.; Rissanen, Juho; Pinston, J.A.; Elomaa, Viki-Veikko; Eronen, Tommi; Hakala, Jani; Jokinen, Ari; Kankainen, Anu; Moore, Iain; Penttilä, Heikki; Saastamoinen, Antti; Weber, Christine; Äystö, Juha (American Physical Society, 2012)Monoisotopic samples of 109Mo nuclei, produced in the deuteron-induced fission of 238U and separated using the IGISOL mass separator coupled to a Penning trap, were used to perform β- and γ -coincidence spectroscopy of ... -
Theoretical predictions of wimp-nucleus and neutrino-nucleus scattering in context of dark matter direct detection
Pirinen, Pekka (University of Jyväskylä, 2018)The nature of dark matter is at present an open question. Assuming the main component of dark matter consists of weakly interacting massive particles (WIMPs), directly detecting such particle via a scattering process ... -
Compound-Nucleus and Doorway-State Decays of β-Delayed Neutron Emitters 51,52,53K
Xu, Z. Y.; Grzywacz, R.; Gottardo, A.; Madurga, M.; Alonso, I. M.; Andreyev, A. N.; Benzoni, G.; Borge, M. J. G.; Cap, T.; Costache, C.; De Witte, H.; Dimitrov, B. I.; Escher, J. E.; Fijalkowska, A.; Fraile, L. M.; Franchoo, S.; Fynbo, H. O. U.; Gonsalves, B. C.; Gross, C. J.; Harkness-Brennan, L. J.; Heideman, J.; Huyse, M.; Judson, D. S.; Kawano, T.; King, T. T.; Kisyov, S.; Kolos, K.; Korgul, A.; Lazarus, I.; Lică, R.; Liu, M. L.; Lynch, L.; Marginean, N.; Marginean, R.; Mazzocchi, C.; Mengoni, D.; Mihai, C.; Morales, A. I.; Page, R. D.; Pakarinen, J.; Paulauskas, S. V.; Perea, A.; Piersa-Siłkowska, M.; Podolyák, Zs.; Sotty, Ch.; Taylor, S.; Tengblad, O.; Van Duppen, P.; Vedia, V.; Verney, D.; Warr, N.; Yuan, C. X. (American Physical Society, 2024)We investigated decays of 51,52,53K at the ISOLDE Decay Station at CERN in order to understand the mechanism of the 𝛽-delayed neutron-emission (𝛽𝑛) process. The experiment quantified neutron and 𝛾-ray emission paths ... -
Structure of 115Ag studied by β− decays of 115Pd and 115mPd
Rissanen, Juho; Kurpeta, Jan; Elomaa, Viki-Veikko; Eronen, Tommi; Hakala, Jani; Jokinen, Ari; Kankainen, Anu; Moore, Iain; Penttilä, Heikki; Plochocki, A.; Saastamoinen, Antti; Urban, W.; Weber, Christine; Äystö, Juha (American Physical Society, 2012)The excited levels of 115Ag have been studied via the beta decay of 115Pd and 115Pdm. The beta-decay schemes for both states have been considerably extended, especially the scheme following the decay of 115Pdm which ...