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.Received 8 November 2015Revised 11 October 2016DOI:https://doi.org/10.1103/PhysRevC.94.064322©2016 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasElectromagnetic transitionsIsomer decaysLifetimes & widthsNuclear structure & decaysProperties150 ≤ A ≤ 189Nuclear Physics
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