Recent developments in the interpretation of the discrete line spectroscopy of deformed rare-earth nuclei

Recent developments in the interpretation of high-spin, discrete-line data in terms of independent-particle motion in a rotating deformed nucleus are discussed. Particular attention is given to the interpretation of the residual interactions derived from a comparison of routhians corresponding to multiple-quasineutron configurations and those constructed from 'experimental' values of the constituent single-quasineutron configurations. Similarly, the correlation between band-crossing frequencies in odd-N nuclei corresponding to the alignment of an isub(13/2) pair of neutrons, and the shape of the valence quasineutron orbit is established for a variety of configurations. The correspondence between the residual-interactions and band-crossing frequencies is discussed, and the extracted estimate of the pairing reduction associated with the 'blocking' of a single quasineutron is compared with BCS estimates for constant level spacings. Finally, some suggestions are made concerning the physical basis of the shift in the hsub(9/2) proton alignment frequencies between vsub(n)=2, π=+ and vsub(n)=4, π=- bands 180Os. (Auth.)