No abstract

No abstract

A new electronic state of water revealed by gas phase multiphoton ionization spectroscopy A new electronic state of ammonia observed by multiphoton ionization J. Chem. Phys. 68, 5656 (1978); 10.1063/1.435700 Multiphoton ionization spectroscopy: A new state of benzene

One-color resonant and nonresonant ionization studies of Si 2 N and Si 2 O have been performed using a pulsed laser vaporization cluster source in conjunction with a time-of-flight mass spectrometer. The ionization potential of Si 2 N is established as less than 6.4 eV, while the ionization potential of Si 2 O is bracketed between 6.4 and 7.9 eV. The experimentally established ionization potential for Si 2 N is confirmed by detailed molecular electronic structure calculations which indicate an adiabatic as well as vertical ionization potential of 6.2 ( 0.05 eV and a close similarity between neutral Si 2 N and ionic Si 2 N + . Similar detailed calculations lead to a best estimate of an adiabatic ionization energy of 7.42 ( 0.04 eV and a vertical ionization energy of 7.66 ( 0.04 eV for Si 2 O.