μ s isomers of Nd 158,160

Ideguchi, E. and Simpson, G. S. and Yokoyama, R. and Tanaka, M. and Nishimura, S. and Kuti, István and Vajta, Zsolt (2016) μ s isomers of Nd 158,160. PHYSICAL REVIEW C, 94 (6). 064322. ISSN 0556-2813

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Abstract

The neutron-rich nuclei Nd158,160 have been studied via delayed γ-ray spectroscopy of μs isomeric states at the RIBF facility, RIKEN. These nuclei were produced following the projectile fission of a 345 AMeVU238 beam and delayed γ rays were detected by the EURICA cluster Ge array. The isomeric states have measured half-lives of 339(20) ns and 1.63(21) μs for Nd158 and Nd160, respectively. From the observed γ decays and the systematics of levels in the neighboring Nd isotopes first level schemes were constructed for these nuclei. The isomeric states of Nd158,160 have been assigned spins of (6-) and (4-), with proposed ν5/2[523] - ν7/2[633] and ν1/2[521] - ν7/2[633] configurations, respectively. © 2016 American Physical Society.

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