TY  - JOUR
AU  - Valiente-Dobon, J. J. et al
AU  - Gadea, A.
AU  - Algora, A.
PY  - 2021
DA  - 2021//
TI  - Manifestation of the Berry phase in the atomic nucleus Pb-213
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 136183
EP  - 5pp
VL  - 816
PB  - Elsevier
AB  - 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.
SN  - 0370-2693
UR  - https://arxiv.org/abs/2010.14859
UR  - https://doi.org/10.1016/j.physletb.2021.136183
DO  - 10.1016/j.physletb.2021.136183
LA  - English
N1  - WOS:000647421500054
ID  - Valiente-Dobon_etal2021
ER  -