A new two-parameter formula for the rotational spectra of well-deformed nuclei is presented for the first time. The formula is deduced from experimental level systematics and alternatively from nuclear hydrodynamics. Comparisons with a great number of rotational spectra of even-even nuclei in rare-earth and actinide regions show that the formula can give a best fitting to the experimental data.

• Received 14 October 1994

DOI:https://doi.org/10.1103/PhysRevC.52.1864