Collective excitations in the transitional nucleiRe163andRe165
| Autor: | Ulrika Jakobsson, F. A. Ali, Sarah Eeckhaudt, Raymond J. Carroll, Sakari Juutinen, Robert Page, Bo Cederwall, J. Thomson, J. P. Revill, David O'Donnell, Tuomas Grahn, P. J. Sapple, Pauli Peura, Paul Greenlees, Juha Uusitalo, Janne Pakarinen, Catherine Scholey, B. Saygi, Jan Sarén, Paivi Nieminen, L. Bianco, Steffen Ketelhut, T. R. Davis-Merry, Michael Drummond, Matti Leino, M. B. Gomez-Hornillos, S. Erturk, Markus Nyman, Jennifer Simpson, Panu Rahkila, Juha Sorri, Peter M. Jones, Mikael Sandzelius, B. Hadinia, D. T. Joss, E. S. Paul, Panu Ruotsalainen, Rauno Julin, Iain Darby |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Physical Review C. 91 |
| ISSN: | 1089-490X 0556-2813 |
| Popis: | Excited states in the neutron-deficient nuclei ${}_{75}^{163}{\mathrm{Re}}_{88}$ and ${}_{75}^{165}{\mathrm{Re}}_{90}$ were populated in the ${}^{106}{\mathrm{Cd}(}^{60}\mathrm{Ni},\phantom{\rule{0.16em}{0ex}}p2n\ensuremath{\gamma})$ and ${}^{92}{\mathrm{Mo}(}^{78}\mathrm{Kr}$, $3p2n\ensuremath{\gamma})$ fusion-evaporation reactions at bombarding energies of 270 and 380 MeV, respectively. \ensuremath{\gamma} rays were detected at the target position using the JUROGAM spectrometer while recoiling ions were separated in-flight by the RITU gas-filled recoil separator and implanted in the GREAT spectrometer. The energy level schemes for $^{163}\mathrm{Re}$ and $^{165}\mathrm{Re}$ were identified using recoil-decay correlation techniques. At low spin, the yrast bands of these isotopes consist of signature partner bands based on a single $\ensuremath{\pi}{h}_{11/2}$ quasiproton configuration. The bands display large energy splitting consistent with the soft triaxial shape typical of transitional nuclei above $N=82$. The configurations of the excited states are proposed within the framework of the cranked shell model. |
| Databáze: | OpenAIRE |
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