Projects per year
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.
|Number of pages||7|
|Journal||Physical Review C|
|Publication status||Published - 4 Apr 2016|
- 1 Finished
Nuclear Physics Consolidated Grant
Wadsworth, R., Wadsworth, R., Andreyev, A., Andreyev, A., Diget, C. A., Diget, C. A., Fulton, B. R., Fulton, B. R., Jenkins, D., Jenkins, D., Laird, A. M. & Laird, A. M.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL, SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/08/14 → 30/09/18
Project: Research project (funded) › Research