OPTICAL ISOTOPE SHIFTS AND CONFIGURATION MIXING AT THE LEVEL (26772)011/2 IN Nd II

Optical isotope shifts in the transition 4f45d 6I11/2-(26772)011/2 of Nd II were measured by using collinear fast-ion-beam laser spectroscopy. The configuration admixtures of the previously unclassified (26772)011/2 level were quantitatively analyzed to be 4f46p, 4f35d2, and 4f35d6s with mixing probabilities of 13%, 85%, 2%, respectively.