Global view of the rotational structure of the $\mathrm{ K^{\pi} = 2^{+} \gamma}$-bands

Abstract.

The correlation of the rotational structure of the $K^{\pi}=2^{+}$$\gamma$-bands, with the $K^{\pi}=0^{+}$ ground bands, of the even-Z even-N atomic nuclei of the mid mass region $(A=140 - 200)$ is reviewed from the global view point. The variation of the energy level pattern with N and Z in the major shell ($Z=50 - 82$, $N=82 - 126$) is illustrated quadrant-wise, through the moment of inertia plots. The correlations are viewed in terms of the dynamic symmetries of the Interacting Boson Model-1. The average value of the power index of the single term power law of level energies in the $\gamma$-band is compared with the ground band. Its variation with neutron number N is displayed for Dy, Er and Os isotopic chains. The effect of the beta stability line across the quadrants is pointed out. Also the variation of the $\gamma$-band head energy $E(2_{\gamma})$ with N and Z and its correlation with ground and $\beta$-band is analyzed.