ROTATIONAL STATES OF EVEN–EVEN NUCLEI

Rotational energy levels of axially asymmetric nuclei were calculated in the manner of Davydov and Filippov, and a comparison with experiment shows good quantitative agreement. It is suggested that agreement may be improved by introducing the Bohr-Mottelson vibrationrotation interaction and a centrifugal stretching correction analogous to the type used in molecular spectra. The D-F method seems to be particularly useful for nuclei in the transition regions between"rotational" and"near-harmonic" modes of collective excitation. (auth)