Extreme ultraviolet laser/time-of-flight mass spectra of Kr-2 near Kr-*(4d,5p('),6s)

New single-photon spectra of jet-cooled Kr-2 between similar to 98 700 and 99 900 cm(-1) have been recorded with an extreme ultraviolet laser generate d by four-wave sum-mixing in Xe gas. Molecular ions created by (1+1') reson ance enhanced multiphoton ionization, and daughter atomic ions created by e xcited state predissociation prior to ionization were mass dispersed and de tected in a time-of-flight mass spectrometer. Analyses of the subsequent si ngle isotopic spectra have resulted in vibrational numbering and constants for eight band systems of Kr-2 that dissociate to Kr(S-1(0))+Kr*(4d,5p('),6 s). Excited state bond lengths were estimated by Franck-Condon factor inten sity simulations. When possible, electronic symmetry assignments for the st ates were established by correlation diagrams constructed from angular mome ntum arguments. Possible reasons are discussed for the deviations observed for the shape of many of the observed Rydberg state potential energy curves from their expected nonbonding form. (C) 2001 American Institute of Physic s.