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Broken seniority sy...
Broken seniority symmetry in the semimagic proton mid-shell nucleus Rh 95
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- Das, Biswarup (författare)
- KTH,Kärnvetenskap och kärnteknik,GSI Helmholtzzentrum für Schwerionenforschung GmbH - Darmstadt, 64291 Germany
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- Cederwall, Bo, 1964- (författare)
- KTH,Kärnvetenskap och kärnteknik
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- Qi, Chong, 1983- (författare)
- KTH,Kärnvetenskap och kärnteknik
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- Aktas, Özge (författare)
- KTH,Kärnvetenskap och kärnteknik
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- Liotta, Roberto (författare)
- KTH,Kärnvetenskap och kärnteknik
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- Vasiljevic, Jana (författare)
- KTH,Kärnvetenskap och kärnteknik
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- Zhao, J. (författare)
- GSI Helmholtzzentrum für Schwerionenforschung GmbH - Darmstadt, 64291 Germany
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(creator_code:org_t)
- American Physical Society (APS), 2024
- 2024
- Engelska.
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Ingår i: Physical Review Research. - : American Physical Society (APS). - 2643-1564. ; 6:2
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Lifetime measurements of low-lying excited states in the semimagic (N=50) nucleus Rh95 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 Rh95 were populated primarily via the β decays of Pd95 nuclei, produced in the projectile fragmentation of a 850 MeV/nucleon Xe124 beam impinging on a 4g/cm2Be9 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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