%0 Journal Article
%T Manifestation of the Berry phase in the atomic nucleus Pb-213
%A Valiente-Dobon, J. J. et al
%A Gadea, A.
%A Algora, A.
%J Physics Letters B
%D 2021
%V 816
%I Elsevier
%@ 0370-2693
%G English
%F Valiente-Dobon_etal2021
%O WOS:000647421500054
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4820), last updated on Wed, 26 May 2021 16:01:25 +0000
%X The neutron-rich Pb-213 isotope was produced in the fragmentation of a primary 1 GeV A U-238 beam, separated in FRS in mass and atomic number, and then implanted for isomer decay gamma-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in Pb-213 are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum J = 0. The conservation of seniority is a consequence of a geometric phase associated with particle-hole conjugation, which becomes observable in semi-magic nuclei where nucleons half-fill the valence shell. The gamma-ray spectroscopic observables in Pb-213 are thus found to be driven by two mechanisms, particle-hole conjugation and seniority conservation, which are intertwined through a Berry phase.
%R 10.1016/j.physletb.2021.136183
%U https://arxiv.org/abs/2010.14859
%U https://doi.org/10.1016/j.physletb.2021.136183
%P 136183-5pp