Collective quadrupole excitations in the 50 < Z, N < 82 nuclei with the general Bohr Hamiltonian

The general Bohr Hamiltonian is applied to a description of low-lying colle ctive excitations in even-even isotopes of Te, Xe, Ba, Ce, Nd and Sm. The c ollective potential and inertial functions are determined by means of the S trutinsky method and the cranking model, respectively. A shell-dependent pa rametrization of the Nilsson potential is used. An approximate particle-num ber projection is performed in the treatment of pairing correlations. The e ffect of coupling with the pairing vibrations is taken into account approxi mately when determining the inertial functions. The calculation does not co ntain any free parameter. (C) 1999 Elsevier Science B.V.