RT Journal Article
T1 First beta-decay spectroscopy of In-135 and new beta-decay branches of In-134
A1 Benito García, Jaime
A1 Fraile Prieto, Luis Mario
A1 Carmona, M.
A1 Galve Lahoz, Pablo
A1 García Díez, P.
A1 Ibañez, P.
A1 López Montes, A.
A1 Martínez, M. C.
A1 Sánchez Parcerisa, Daniel
A1 Sánchez Tembleque, Víctor
A1 Udías Moinelo, José Manuel
A1 Vedia Fernández, María Victoria
A1 Villa, A.
A1 otros, ...
AB The beta decay of the neutron-rich In-134 and In-135 was investigated experimentally in order to provide new insights into the nuclear structure of the tin isotopes with magic proton number Z = 50 above the N = 82 shell. The beta-delayed gamma-ray spectroscopy measurement was performed at the ISOLDE facility at CERN, where indium isotopes were selectively laser-ionized and on-line mass separated. Three beta-decay branches of In-134 were established, two of which were observed for the first time. Population of neutron-unbound states decaying via. rays was identified in the two daughter nuclei of In-134, Sn-134 and Sn-133, at excitation energies exceeding the neutron separation energy by 1 MeV. The beta-delayed one- and two-neutron emission branching ratios of In-134 were determined and compared with theoretical calculations. The beta-delayed one-neutron decay was observed to be dominant beta-decay branch of In-134 even though the Gamow-Teller resonance is located substantially above the two-neutron separation energy of Sn-134. Transitions following the beta decay of In-135 are reported for the first time, including. rays tentatively attributed to Sn-135. In total, six new levels were identified in Sn-134 on the basis of the beta.. coincidences observed in the In-134 and In-135 beta decays. A transition that might be a candidate for deexciting the missing neutron single-particle 13/2(+) state in Sn-133 was observed in both beta decays and its assignment is discussed. Experimental level schemes of Sn-134 and Sn-135 are compared with shell-model predictions. Using the fast timing technique, half-lives of the 2(+), 4(+), and 6(+) levels in Sn-134 were determined. From the lifetime of the 4(+) state measured for the first time, an unexpectedly large B(E2; 4(+)-> 2(+)) transition strength was deduced, which is not reproduced by the shell-model calculations.
PB Amer Physical Soc
SN 2469-9985
YR 2021
FD 2021-10-26
LK https://hdl.handle.net/20.500.14352/4760
UL https://hdl.handle.net/20.500.14352/4760
LA eng
NO Artículo firmado por 93 autores. M.P.-S. acknowledges the funding support from the Polish National Science Center under Grants No. 2019/33/N/ST2/03023 and No. 2020/36/T/ST2/00547 (Doctoral scholarship ETIUDA). J.B. acknowledges support from the Universidad Complutense de Madrid under the Predoctoral Grant No. CT27/16CT28/16. This work was partially funded by the Polish National Science Center under Grants No. 2020/39/B/ST2/02346, No. 2015/18/E/ST2/00217, and No. 2015/18/M/ST2/00523, by the Spanish government via Projects No. FPA2017-87568-P, No. RTI2018-09886 8-B-I00, No. PID2019-104390GB-I00, and No. PID2019-104714GB-C21, by the U.K. Science and Technology Facilities Council (STFC), the German BMBF under Contract No. 05P18PKCIA, by the Portuguese FCT under the Projects No. CERN/FIS-PAR/0005/2017, and No. CERN/FIS-TEC/0003/2019, and by the Romanian IFA Grant CERN/ISOLDE. The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 654002. M.Str. acknowledges the funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 771036 (ERC CoG MAIDEN). J.P. acknowledges support from the Academy of Finland (Finland) with Grant No. 307685. Work at the University of York was supported under STFC Grants No. ST/L005727/1 and No. ST/P003885/1.
NO Unión Europea. Horizonte 2020
NO Ministerio de Economía y Competitividad (MINECO)
NO Polish National Science Center
NO Universidad Complutense de Madrid
NO U.K. Science and Technology Facilities Council (STFC) UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC)
NO German BMBF Federal Ministry of Education & Research (BMBF)
NO Portuguese FCT Portuguese Foundation for Science and Technology
NO Romanian IFA Grant CERN/ISOLDE
NO Comisión Europea
NO Academy of Finland
NO STFC UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC)
DS Docta Complutense
RD 27 abr 2024