Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-07-02
Journal of Physics G: Nuclear and Particle Physics 37 (2010) 105102
Physics
Nuclear Physics
Nuclear Theory
15 pages, 7 figures, 4 tables, accepted for publication in Journal of Physics G
Scientific paper
10.1088/0954-3899/37/10/105102
Even--even nuclei in the $A\sim100$ mass region are investigated within the framework of the interacting boson model-1 ({IBM-1}). The study includes energy spectra and electric quadrupole transition properties of zirconium, molybdenum, ruthenium and palladium isotopes with neutron number $N\geq52$. A global parametrization of the {IBM-1} Hamiltonian is found leading to a description of about 300 collective levels in 30 nuclei with a root-mean-square deviation from the observed level energies of 120 keV. The importance of the $d_{5/2}$ subshell closure at neutron number N=56 is pointed out. The geometric character of the nuclei can be visualized by plotting the potential energy surface $V(\beta,\gamma)$ obtained from the {IBM-1} Hamiltonian in the classical limit. The parametrization established on the basis of known elements is used to predict properties of the unknown, neutron-rich isotopes $^{106}$Zr, $^{112}$Mo, $^{116}$Ru and $^{122}$Pd.
Böyükata M.
Isacker Piet Van
Uluer I.
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