Abstract
The decay of to the levels of was studied at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Lab (ORNL). A purified beam was developed and data were recorded for the decay of the decay chain using four high-purity germanium (HPGe) clover detectors at the Low-energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS). In this measurement, data on γ-ray emission following decay, including and coincidences, were collected and spectra were analyzed to identify the statistically significant coincidences. From this analysis, we propose a level scheme for which contains a total of 59 energy levels up to 6.0 MeV containing 105 rays. We have identified an additional 53 rays associated with this decay which could not be place in the decay scheme due to insufficient coincidence information or no energy match to identified levels. No rays from states in fed in the delayed-neutron branch were observed even though other rays in the decay chain were observed. Spin and parity assignments are proposed for some levels based on comparison to systematics and shell model calculations.
1 More- Received 2 March 2020
- Revised 7 July 2022
- Accepted 2 September 2022
DOI:https://doi.org/10.1103/PhysRevC.106.044311
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