Multiple Coulomb Excitation of 167Er

The ground-state rotational band in 167 Er has been investigated through multiple Coulomb excitation with a 160-MeV 35 Cl beam, Excited states up to 25/2 + were established by measuring γ-γ coincidences and γ-ray angular distributions. Nuclear lifetimes for levels up to spin 23/2 have been determined by analysis of Doppler broadened γ-ray lineshapes. Considerable signature dependence was observed in level energies and M1 transition probabilities.