Abstract
Low-spin structures in were populated using the (, ) heavy-ion fusion-evaporation reaction at a beam energy of 111 MeV. Charged particles and γ rays were emitted in the reactions and detected by the DIAMANT CsI ball and the EXOGAM Ge array, respectively. In addition to the previously reported low-to-medium spin states in these nuclei, new low-spin structures were observed. Angular correlation and linear polarization measurements were performed in order to unambiguously determine the spins and parities of intensely populated states in . Quasiparticle Random Phase Approximation (QRPA) calculations were performed for the first and second excited states in and . The results are in qualitative agreement with the experimental results, supporting a collective interpretation of the low-spin states for these transitional nuclei.
- Received 15 March 2007
DOI:https://doi.org/10.1103/PhysRevC.76.014307
©2007 American Physical Society