Nuclear structure Decay properties of ground - state and isomer of liWIn

The J-decay properties ofground-state and iso-_ mer of l03In were investigated by means of --ray spec troscopy. The half-lives of l03*In and ,03mIn were deter mined to be 60 ± 1s and 34 ± 2 s. respectively. Out of 149 transitions ascribed to the decay of ,0-»In, 104 have been placed in a decay scheme including 55 excited states of ,03flCd. The main part of the resulting distribution of the Gamow-Teller strength B(GT) is associated with the feed ing of l03Cd levels at excitation energies around 3MeV. This observation can be interpreted as a sign ofdominant feeding of three-quasiparticle states in ,03Cd. which correspond to the l+0rg7/,. i/gTz-OC *&rshell-model configuration spread over manv levels. The sum ofthe B(GT) values deduced trom the present7-ray data amounts to 0.34. which provides alower limit to the total Gamow-Teller strength. The B(GT) distribu tion for ,03In decay is compared to the corresponding exper imental results for iw-""-«»In and l0 theoretical predictions for Wl0,ln. The latter were calculated by using an advanced spherical shell model. The J-branching ratio for the ""In decay is estimated and compared with the relevant values for the neighbouring indium isotopes including In whose haltlife was determined to be 14.9 ± 1-2 s. PACS: 2l.10.-k: 21.60.Cs; 23.40.Hc; 27.60.+J