2024-03-19T03:58:30Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1416072020-06-16T11:39:54Zcom_10261_135com_10261_4com_10261_61col_10261_388col_10261_314
Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in Sn129
Lică, R.
Mach, H.
Fraile, Luis M.
García Borge, María José
Marroquín, I.
Morales, Ana Isabel
Nácher, Enrique
Perea, Ángel
Rotaru, F.
Tengblad, Olof
Vidal, M.
Centro Nacional de Física de Partículas, Astropartículas y Nuclear (España)
Ministerio de Economía y Competitividad (España)
Research Foundation - Flanders
Belgian Science Policy Office
Universidad Complutense de Madrid
European Organization for Nuclear Research
Science and Technology Facilities Council (UK)
European Commission
SCOAP
Ministero dell'Istruzione, dell'Università e della Ricerca
R. Lică et al. ; 7 págs.; 5 figs.; 3 tabs. ; Open Access funded by Creative Commons Atribution Licence 3.0
The levels in Sn129 populated from the β- decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 12+ state and the 32+ ground state in Sn129 are expected to have configurations dominated by the neutron s12 (l=0) and d32 (l=2) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we have measured the half-life of the 12+ 315.3-keV state, T12= 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T12 value by the renormalization of the M1 effective operator for neutron holes.
This work was partially supported by the Spanish MINECO through Projects
No. FPA2012-32443, No. FPA2013-41267-P, and CPAN
Consolider (Project No. CSD-2007-00042), and by Romanian
IFA Grant CERN/ISOLDE. It was also partly funded by
the NuPNET network FATIMA (PRI-PIMNUP-2011-1338),
by FWO-Vlaanderen (Belgium), by GOA/2010/010 (BOF
KU Leuven), and by the Interuniversity Attraction Poles
Programme initiated by the Belgian Science PolicyOffice
(BriX network P7/12). Support from Grupo de Física Nuclear
(GFN-UCM), Programmi di Ricerca Scientifica di Rilevante
Interesse Nazionale (PRIN) Grant No. 2001024324 01302,
German BMBF under Contracts No. 05P12PKFNE and No.
05P15PKCIA, the U.K. Science and Technology Facilities
Council, and the European Union Seventh Framework through
ENSAR (Contract No. 262010) is also acknowledged. Fasttiming
electronics were provided by the Fast Timing Collaboration,
the ISOLDE Decay Station collaboration, and MASTICON.
Peer Reviewed
2016-12-19T08:58:04Z
2016-12-19T08:58:04Z
2016-04-04
2016-12-19T08:58:09Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1103PhysRevC/93.044303
issn: 1089-490X
Physical Review C - Nuclear Physics 93: 044303 (2016)
http://hdl.handle.net/10261/141607
10.1103PhysRevC/93.044303
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100003130
http://dx.doi.org/10.13039/501100002911
http://dx.doi.org/10.13039/501100000271
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003407
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2013-41267-P
info:eu-repo/grantAgreement/EC/FP7/262010
Publisher's version
https://doi.org/10.1103/PhysRevC.93.044303
Sí
open
American Physical Society