@Article{Morales2018,
author="Morales, A. I. et al",
title="Is seniority a partial dynamic symmetry in the first {\^I}{\textonehalf}g(9/2) shell?",
journal="Physics Letters B",
year="2018",
publisher="Elsevier Science Bv",
volume="781",
pages="706--712",
abstract="The low-lying structures of the midshell vg(9/2) Ni isotopes Ni-72 and Ni-74 have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following beta decay of the mother nuclei Co-72 and Co-74. As a result, we provide a complete picture in terms of the seniority scheme up to the first (8(+)) levels for both nuclei. The experimental results are compared to shell-model calculations in order to define to what extent the seniority quantum number is preserved in the first neutron g(9/2) shell. We find that the disappearance of the seniority isomerism in the (8(1)(+)) states can be explained by a lowering of the seniority-four (6(+)) levels as predicted years ago. For Ni-74, the internal de-excitation pattern of the newly observed (6(2)(+)) state supports a restoration of the normal seniority ordering up to spin J = 4. This property, unexplained by the shell-model calculations, is in agreement with a dominance of the single-particle spherical regime near Ni-78.",
optnote="WOS:000435653100092",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3635), last updated on Mon, 09 Jul 2018 12:51:28 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2018.04.049",
opturl="http://arxiv.org/abs/1710.11207",
opturl="https://doi.org/10.1016/j.physletb.2018.04.049",
archivePrefix="arXiv",
eprint="1710.11207",
language="English"
}