Author/Authors :
F. Brandolini، نويسنده , , M. Ionescu-Bujor، نويسنده , , N.H. Medina، نويسنده , , R.V. Ribas، نويسنده , , D. Bazzacco، نويسنده , , M. De Poli، نويسنده , , P. Pavan، نويسنده , , C. Rossi Alvarez، نويسنده , , G. De Angelis، نويسنده , , S. Lunardi، نويسنده , , D. De Acuna، نويسنده , , D.R. Napoli، نويسنده , , S. Frauendorf، نويسنده ,
Abstract :
Lifetimes have been measured in 139Sm with the DSAM method, using the reaction 62Ni(81Br,p3n)139Sm at 350 MeV. In the negative-parity regular dipole band based on the 252− state at 3325 keV values of 0.60(21), 0.40(14) and 0.25(8) ps were found for the 337, 409 and 473 keV transitions, respectively. The deduced B(M1) and B(E2) are in agreement with the predictions of the tilted axis cranking model, allowing a triaxial equilibrium shape for the assumed νh112 ⊗ πh1122 configuration.
Keywords :
Cranking shell model , Fusion-evaporation , Lifetimes , Triaxial deformation , Total routhian surface calculations , Tilted axis cranking model
