RT Journal Article
T1 Low-spin states in Ge-80 populated in the beta decay of the Ga-80 3(-) isomer
A1 Fraile Prieto, Luis Mario
A1 Mach, Henryk Andrzej
A1 Paziy, Vadym
A1 otros, ...
AB The structure of Ge-80 has been investigated at the ISOLDE facility at CERN. A previous study reported for the first time a low-lying 0(2)(+) intruder state at 639 keV, based on the coincidence with a previously unobserved 1764-keV gamma ray, and suggested it as evidence for shape coexistence in Ge-80. We used the beta decay from the 3(-) 22.4-keV state in Ga-80 to enhance the population of low-spin states in Ge-80, including any excited 0(+) level, and gamma gamma coincidences to investigate it. We observed a 1764-keV gamma ray in coincidence with strong transitions in Ge-80, thus not feeding the proposed 639-keV 0(2)(+). No connecting transitions from previously known levels to the 639-keV and 2403-keV 2(3)(+) states could be established either. Shell-model calculations for Ge isotopes and N = 48 isotones were performed. They succeed to explain most of the experimental levels, but fail to reproduce the presence of a 0(2)(+) state below approximate to 1200 keV in Ge-80. Our experimental findings and shell-model calculations are difficult to reconcile with a very low-lying 0(2)(+) state in Ge-80.
PB Amer Physical Soc
SN 2469-9985
YR 2021
FD 2021-08-10
LK https://hdl.handle.net/20.500.14352/4456
UL https://hdl.handle.net/20.500.14352/4456
LA eng
NO Artículo firmado por 30 autores. This work was supported by Spanish national projects FPA2015-65035-P, RTI2018-098868-B-I00, and PID2019-104390GB-I00, by Grupo de Física Nuclear (GFN) at Universidad Complutense (Spain), by the U.S. DoE Grant No. DE-FG02-94ER40834, and by the German BMBF Grant 05P19PKFNA. The support by the European Union Seventh Framework through ENSAR (Contract No. 262010) and by the ISOLDE Collaboration and technical teams is acknowledged.
NO Unión Europea. FP7
NO Ministerio de Ciencia e Innovación (MICINN)
NO Grupo de Física Nuclear (GFN) at Universidad Complutense (Spain)
NO U.S. DoE United States Department of Energy (DOE)
NO German BMBF Federal Ministry of Education & Research
NO ISOLDE Collaboration and technical teams
DS Docta Complutense
RD 14 may 2024