| Autor: |
Garrett, P.E., Makhathini, L., Bark, R.A., Rodríguez, T.R., Valbuena, S., Bildstein, V., Bucher, T.D., Burbadge, C., Dubey, R., Faestermann, T., Hertenberger, R., Kamil, M., Lawrie, E.A., Leach, K.G., MacLean, A.D., Mehl, C., Mthembu, S.H., Mukwevho, N.J., Ngwetsheni, C., Ntshangase, S.S., Nzobadila Ondze, J.C., Orce, J.N., Rebeiro, B., Singh, B., Triambak, S., Vyfers, E.C., Wirth, H.F. |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Zdroj: |
Physics Letters |
| Popis: |
Excited states in $^{98}$Ru were investigated using γ-ray spectroscopy following the β-decay of $^{98}$Rh, and via the $^{100}$Ru(p,t) reaction. Combining the results from the two experiments, two states were revised to have spin-parity of 4+ and subsequently assigned to the 02+ and “γ” bands, respectively. The observed structures in $^{98}$Ru are suggested to be deformed and rotational, rather than spherical and vibrational, and fit well into the systematics of these excitations in the Ru isotopes. The 02+ excitation is suggested as a shape coexisting configuration. This observation eliminates some of the last remaining candidates for nearly harmonic vibrational nuclei in the Z≈50 region. Beyond-mean-field calculations are presented that support shape coexistence throughout the Ru isotopes with N=52–62, and suggest a smooth evolution of the shapes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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