Towards new understanding of nuclear rotation
  Properties of time evolution of wave packets built up from rotator eigenstates are discussed. The mechanism of perfect cloning of the initial wave packet for "circular states" at fractional revival times is explained. The smooth transition from "circular" to "linear" through intermediate "elliptic" is described. Example of time evolution of a nuclear wave packet created in Coulomb excitation mechanism is presented. 
P. Rozmej and R. Arvieu