Abstract
The Rh-109,Rh-111,Rh-113 nuclei have been produced as fission fragments in the fusion reaction O-18+Pb-208 at 85 MeV. Their level schemes have been built from gamma-rays detected using the Euroball IV array. High-spin states of the neutron-rich Rh-111,Rh-113 nuclei have been identified for the first time. Several rotational bands with the odd proton occupying the pig(9/2), pip(1/2) and pi(g(7/2)/d(5/2)) sub-shells have been observed. A band of low-energy transitions has been identified at excitation energy around 2 MeV in Rh-109,Rh-111, which can be interpreted in terms of three-quasiparticle excitation, pig(9/2) nuh(11/2) nug(7/2)/d(5/2). In addition another structure built on states located at low excitation energy (608 keV in Rh-111, 570 keV in Rh-113) points out that, as already observed in the lighter isotopes Rh-107,Rh-109, triaxial deformation plays a role in the neutron-rich Rh isotopes well beyond the mid-shell.
| Original language | English |
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| Pages (from-to) | 429-433 |
| Number of pages | 5 |
| Journal | European Physical Journal A |
| Volume | 15(4) |
| Issue number | 4 |
| Publication status | Published - 1 Dec 2002 |