RT Journal Article
T1 Octupole states in 207Tl studied through β decay
A1 Fraile Prieto, Luis Mario
A1 Vedia Fernández, María Victoria
A1 otros, ...
AB The β decay of Hg-207 into the single-proton-hole nucleus Tl-207 has been studied through gamma-ray spectroscopy at the ISOLDE Decay Station (IDS) with the aim of identifying states resulting from coupling of the pi s(1/2)(-1), pi d(3/2)(-1) and pi h(11/2)(-1) shell model orbitals to the collective octupole vibration. Twenty-two states were observed lying between 2.6 and 4.0 MeV, eleven of which were observed for the first time, and 78 new transitions were placed. Two octupole states (s(3/2)-coupled) are identified and three more states (d(3/2)-coupled) are tentatively assigned using spin-parity inferences, while further h(11/2)-coupled states may also have been observed for the first time. Comparisons are made with state-of-the-art large-scale shell model calculations and previous observations made in this region, and systematic underestimation of the energy of the octupole vibrational states is noted. We suggest that in order to resolve the difference in predicted energies for collective and noncollective t = 1 states (t is the number of nucleons breaking the Pb-208 core), the effect of t = 2 mixing may be reduced for octupole-coupled states. The inclusion of mixing with t = 0, 2, 3 excitations is necessary to replicate all t = 1 state energies accurately.
PB American Physical Society
SN 2469-9985
YR 2020
FD 2020-05-18
LK https://hdl.handle.net/20.500.14352/6331
UL https://hdl.handle.net/20.500.14352/6331
LA eng
NO Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Artículo firmado por 67 autores. 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. Support from the European Union Seventh Framework through ENSAR Contract No. 262010, the Science and Technology Facilities Council (UK), the MINECO Projects No. FPA2015-64969-P and No. FPA2017-87568-P (Spain), FWO-Vlaanderen (Belgium), GOA/2015/010 (BOF KU Leuven), the Excellence of Science Programme (EOS-FWO), the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office (BriX network P7/12), the German BMBF under Contract No. 05P18PKCIA + "Verbundprojekt 05P2018," the Polish National Science Centre under Contracts No. UMO-2015/18/M/ST2/00523 and No. UMO-2019/33/N/ST2/03023, the National Science Foundation (US) Grant No. PHY-1811855 and the Romanian IFA project CERN-RO/ISOLDE is acknowledged. P.H.R. and S.M.J. acknowledge support from the UK Department for Business, Energy and Industrial Strategy via the National Measurement Office.
NO Unión Europea. Horizonte 2020
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO Science and Technology Facilities Council (UK) Science & Technology Facilities Council (STFC)
NO FWO-Vlaanderen (Belgium)
NO BOF KU Leuven
NO Excellence of Science Programme (EOS-FWO)
NO Interuniversity Attraction Poles Programme Belgian Federal Science Policy Office
NO Belgian Science Policy Office (BriX network)
NO German BMBF Federal Ministry of Education & Research
NO Polish National Science Centre
NO National Science Foundation (US)
NO Romanian IFA project CERN-RO/ISOLDE
NO UK Department for Business, Energy and Industrial Strategy via the National Measurement Office
DS Docta Complutense
RD 10 abr 2025