NUCLEAR-STRUCTURE OF W-183 STUDIED IN (N,GAMMA), (N,N'GAMMA) AND (D,P) REACTIONS

The nucleus W-183 was studied with (n, gamma), (n, gamma gamma) and (n , n'gamma) reactions at the Nuclear Research Center Reactor in Riga an d with the (d, p) reaction measured with the Q3D spectrograph at the M unich Tandem Accelerator. The W-183 gamma-transition data from the (n, gamma) reaction were obtained in the energy range from 90 to 6200 keV and from the (n, n'gamma) reaction in the energy range from 40 to 208 0 keV. The new data allowed to obtain much more accurately the energie s and depopulation of excited levels, and to extend the level scheme u p to about 1.7 MeV. The one-quasiparticle states below 1.6 MeV were in terpreted as belonging to the Nilsson configurations 1/2(-)[510], 1/2( -)[501], 1/2(-)[521], 3/2(-)[512], 3/2(-)[501], 3/2(-)[521], 3/2(+)[64 2], 3/2(+)[651], 5/2(+)[642], 5/2(-)[512], 7/2(-)[503], 7/2(-)[514], 9 /2(-)[505], 9/2(+)[624], 11/2(+)[615] and to the beta delta-vibrationa l band. Structure calculations in terms of the quasiparticle-phonon an d quasiparticle-rotation-vibration models were performed.