2024-03-19T03:00:38Zhttp://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
00925njm 22002777a 4500
dc
Lică, R.
author
Mach, H.
author
Fraile, Luis M.
author
García Borge, María José
author
Marroquín, I.
author
Morales, Ana Isabel
author
Nácher, Enrique
author
Perea, Ángel
author
Rotaru, F.
author
Tengblad, Olof
author
Vidal, M.
author
2016-04-04
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.
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
Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in Sn129