2024-03-19T12:53:19Zhttp://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
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.
2016-12-19T08:58:04Z
2016-12-19T08:58:04Z
2016-04-04
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
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.
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http://creativecommons.org/licenses/by/3.0/
openAccess
Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in Sn129
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