Abstract
Negative ion photoelectron spectra of SiN- have been recorded using the 355 nm (3.493 eV) and 266 nm (4.661 eV) photodetachment wavelengths. The spectra exhibit resolved vibrational features corresponding to transitions to the X 2Σ+ and A 2Π states of SiN. Franck−Condon analyses yield the first experimental spectroscopic parameters, re and ωe, for the anion ground state, X 1Σ+. We also determined the first experimental adiabatic electron affinity as 2.949 ± 0.008 eV. The anion dissociation energy D0(SiN-) is then obtained from the electron affinities of Si and SiN and the dissociation energy of the neutral.
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