%0 Journal Article
%T Rapid structural change in low-lying states of neutron-rich Sr and Zr isotopes
%A H. Mei
%A J. Xiang
%A J. M. Yao
%A Z. P. Li
%A J. Meng
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevC.85.034321
%X The rapid structural change in low-lying collective excitation states of neutron-rich Sr and Zr isotopes is tudied by solving a five-dimensional collective Hamiltonian with parameters determined by both relativistic mean-field and non-relativistic Skyrme-Hartree-Fock calculations using the PC-PK1 and SLy4 forces respectively. Pair correlations are treated in BCS method with either a separable pairing force or a density-dependent zero-range force. The isotope shifts, excitation energies, electric monopole and quadrupole transition strengths are calculated and compared with corresponding experimental data. The calculated results with both the PC-PK1 and SLy4 forces exhibit a picture of spherical-oblate-prolate shape transition in neutron-rich Sr and Zr isotopes. Compared with the experimental data, the PC-PK1 (or SLy4) force predicts a more moderate (or dramatic) change in most of the collective properties around N=60. The underlying microscopic mechanism responsible for the rapid transition is discussed.
%U http://arxiv.org/abs/1201.3556v1