Rakesh Popli

Evidence for ground and both neutron and proton rotational aligned bands in 68Ge

Abstract From in-beam, γ-ray spectroscopy, the yrast band in 68Ge is found to branch into three positive parity bands at 8+. Bands built on both the yrast 8+ and second 8+ levels show strong backbending in I while the third is apparently a continuation of the ground band. The two lowest 8+ bands provide the first evidence for both proton and neutron rotation-aligned bands built on the same configuration in the one nucleus, here g 9 2 ) 2 . Rotational aligned model calculations confirm these assignments.

Symmetric rotor interpretation of transitional nuclei

Abstract A rotational interpretation in the strong coupling limit is applied to transitional nuclei in the mass-70, -100, -120 regions. The calculations use a symmetric rotor with relatively small deformation and a variable moment of inertia is included explicitly. It is shown that this simple model, which is essentially similar to that used for strongly deformed nuclei, is in good agreement with a wide range of phenomena observed in transitional nuclei. Energy levels, branching ratios, and mixing ratios are included in the comparison to experimental data.