Mixed-symmetry states in weakly deformed nuclei from (n,n’γ) reaction studies

Summary

The current status of 2⁺ mixed-symmetry states in weakly deformed nuclei is described, and recent contributions from the (n,n’γ) reaction to our understanding of these states in nuclei around ⁹⁴Mo are reviewed. The recent identification and characterization of two-phonon states, which are composed of the 2⁺ mixed-symmetry state coupled with the 2⁺ symmetric quadrupole phonon, are particularly significant and help clarify the picture of mixed-symmetry states as being generally occurring collective excitations.