Abstract

Inelastic scattering exciting the 2 2 + and 4 2 + members of the γ-vibrational band in 168Er has been investigated with 65 MeV polarized protons. A coupled-channel analysis has been performed assuming both the γ-vibrational model and the asymmetric-rotor model. A large hexadecapole term ( Y 42 + Y 4−2) in the γ-motion is necessary in order to reproduce the experimental data.

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