Abstract

Starting from a simplified picture treating proton two-particle two-hole excitations coupled with spherical quadrupole vibrations, in interaction with the low-lying quadrupole vibrational states in the doubly even Sn nuclei, we are able to account for a regular ΔJ = 2 band structure on top of excited J π = 0 + states. We compare in some detail results for 116Sn concering energy spectra and E2 transition rates.

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