Coulomb excitation studies of 160Dy, 162Dy and 164Dy

Abstract

Coulomb excitation measurements with 16O and 4He projectiles have been performed on 160Dy, 162Dy, and 164Dy. The ground-state rotational bands up through the 8 + member were observed in the 16O experiments. The measured excitation probabilities yield B(E2; I → I −2) values which are generally in agreement with the rotational predictions except for the 6 + → 4 + values. In each nucleus, probabilities for exciting the 2 +, 4 +, and 6 + members of the γ-vibrational band were measured and compared with calculated results. The B (E2; 0 + → 2 + γ) values were measured in experiments involving 4He ions. The K π = 2 − octupole band was observed in each nucleus in addition to 1 − bands in 160Dy and 162Dy. Excitation probabilities were analyzed in an attempt to extract B(E3) values.