Is seniority a partial dynamic symmetry in the first vg(9/2) shell?
- RICE, S.
- CRESPI, F. C. L.
- DELATTRET, M. -C.
- DOMBRADI, Zs.
- GOTTARDO, A.
- ISOBE, T.
- KOJOUHAROV, I.
- KURZ, N.
- KUTI, I.
- Lalkovski, S.
- MATSUI, K.
- MELON, B.
- MENGONI, D.
- MIYAZAKI, T.
- MODAMIO-HOYBJOR, V.
- MOMIYAMA, S.
- NAPOLI, D. R.
- NIIKURA, M.
- ORLANDI, R.
- Podolyak, Zs.
- Regan, P. H.
- SAKURAI, H.
- SAHIN, E.
- SOHLER, D.
- SCHAFFNER, H.
- TANIUCHI, R.
- TAPROGGE, J.
- VAJTA, Zs.
- WIELAND, O.
- Yalcinkaya, Mehtap
- BENZONI, G.
- WATANABE, H.
- DE ANGELIS, G.
- NISHIMURA, S.
- CORAGGIO, L.
- GARGANO, A.
- ITACO, N. g
- OTSUKA, T.
- TSUNODA, Y.
- VAN ISACKER, R.
- BROWNE, F.
- Daido, R.
- DOORNENBAL, R.
- Fang, Y.
- LORUSSO, G.
- PATEL, Z.
- MORALES, A. I.
- SINCLAIR, L.
- SODERSTROM, P-A.
- Sumikama, T.
- VALIENTE-DOBON, J. J.
- WU, J.
- XU, Z. Y.
- Yagi, A.
- YOKOYAMA, R.
- BABA, H.
- AVIGO, R.
- GARROTE, F. L. Bello
- BLASI, N.
- BRACCO, A.
- BRUCE, A. M.
- CAMERA, F.
- CERUTI, S.
DOIAbstract
The low-lying structures of the midshell vg(9/2) Ni isotopes Ni-72 and Ni-74 have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following beta decay of the mother nuclei Co-72 and Co-74. As a result, we provide a complete picture in terms of the seniority scheme up to the first (8(+)) levels for both nuclei. The experimental results are compared to shell-model calculations in order to define to what extent the seniority quantum number is preserved in the first neutron g(9/2) shell. We find that the disappearance of the seniority isomerism in the (8(1)(+)) states can be explained by a lowering of the seniority-four (6(+)) levels as pred...
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