A New Expression for Nuclear Rotational Spectra

Feng Pan, Louisiana State University
Yan'an Luo, Nanjing University
J. P. Draayer, Louisiana State University


A new formula, which is derived from a deformed rotor model for describing nuclear rotational spectra, is analyzed. The ground band of most even-even rare-earth and actinide nuclei are accurately reproduced using a damped nonlinear least-square fitting procedure for determining parameters of the theory. The results show that energy spectra obtained from a deformed rotor model are more accurate than those from a three-parameter formula based on perturbation theory.