Abstract
The neutron-rich nuclei have been studied via delayed -ray spectroscopy of isomeric states at the RIBF facility, RIKEN. These nuclei were produced following the projectile fission of a 345 beam and delayed rays were detected by the EURICA cluster Ge array. The isomeric states have measured half-lives of 339(20) ns and 1.63(21) for and , respectively. From the observed decays and the systematics of levels in the neighboring Nd isotopes first level schemes were constructed for these nuclei. The isomeric states of have been assigned spins of and , with proposed and configurations, respectively.
- Received 8 November 2015
- Revised 11 October 2016
DOI:https://doi.org/10.1103/PhysRevC.94.064322
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