VIBRATIONAL STRUCTURE OF LIGATED NIOBIUM CLUSTERS: PULSED FIELD IONIZATION ZERO KINETIC ENERGY PHOTOELECTRON SPECTROSCOPY AND DENSITY FUNCTIONAL THEORY CALCULATIONS - Yang, Dong-Sheng; Hackett, PA; Rayner, David R; Salahub, Dennis R; Roy, Pierre-Nicholas; Carrington Jr, T; others (Ohio State University, 1995)