Abstract
Excited states in and were populated using the reaction at beam energy. Fusion evaporation recoils were selected using the gas-filled spectrometer, SASSYER. Prompt rays were detected using Compton-suppressed Ge detectors from the YRAST Ball array surrounding the target. Delayed rays, following isomeric decays, were detected at the focal plane of SASSYER with a smaller array of Ge detectors. The decay energy and lifetime for the isomer of were determined; values for the yrast in and neighboring nuclei are interpreted within the seniority scheme. This isomer was also used to select -rays deexciting levels above the isomeric state in . In addition, transitions in were identified for the first time. Two high-spin isomers are suggested to exist in this isotope.
1 More- Received 23 December 2003
DOI:https://doi.org/10.1103/PhysRevC.69.034331
©2004 American Physical Society