Abstract
The excited states of and isotopes are studied using -ray and electron spectroscopy in off-beam and in-beam modes following (,) reactions. Experiments include measurements of single -rays and conversion electron spectra as well as -, electron-, , and coincidences with the use of the OSIRIS-II 12-HPGe array and conversion electron spectrometer. Based on the present results, the level schemes of and are revised and significantly extended, up to about 4 and 5 MeV of excitation energy, respectively. Spin and parity of are assigned to the -s isomer in based on conversion electron results. Previously unobserved rays feeding the isomer in and the isomer in nuclei are proposed. Shell-model calculations are performed. Possible core-excited states in are discussed.
7 More- Received 7 December 2009
DOI:https://doi.org/10.1103/PhysRevC.81.044305
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