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Search for the Ga 73 ground-state doublet splitting in the β decay of Zn 73

AuthorsVedia, V.; Paziy, V.; Fraile, L. M.; Briz, José Antonio ; Olaizola, B.; Stroe, L.; Mach, H.
Issue Date12-Sep-2017
PublisherAmerican Physical Society
CitationPhysical Review C 96:034311 (2017)
AbstractThe existence of two close-lying nuclear states in Ga73 has recently been experimentally determined: a 1/2- spin-parity for the ground state was measured in a laser spectroscopy experiment, while a Jπ=3/2- level was observed in transfer reactions. This scenario is supported by Coulomb excitation studies, which set a limit for the energy splitting of 0.8 keV. In this work, we report on the study of the excited structure of Ga73 populated in the β decay of Zn73 produced at ISOLDE, CERN. Using β-gated, γ-ray singles, and γ-γ coincidences, we have searched for energy differences to try to delimit the ground-state energy splitting, providing a more stringent energy difference limit. Three new half-lives of excited states in Ga73 have been measured using the fast-timing method with LaBr3(Ce) detectors. From our study, we help clarify the excited structure of Ga73 and we extend the existing Zn73 decay to Ga73 with 8 new energy levels and 35 γ transitions. We observe a 195-keV transition consistent with a γ ray de-exciting a short-lived state in the β-decay parent Zn73.
DescriptionV. Vedía et al. -- 13 pags., 10 figs., 3 tabs.
Publisher version (URL)https://doi.org/10.1103/PhysRevC.96.034311
Identifiersdoi: 10.1103/PhysRevC.96.034311
issn: 2469-9993
Appears in Collections:(CFMAC-IEM) Artículos
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