High-spin structure of the neutron-rich ¹⁰⁹, ¹¹¹, ¹¹³Rh₄₅ isotopes

T Venkova, Laurent Donadille

Research output: Contribution to journalArticle


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 languageEnglish
Pages (from-to)429-433
Number of pages5
JournalEuropean Physical Journal A
Issue number4
Publication statusPublished - 1 Dec 2002


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