Anion photoelectron spectra of the carbon monohydrides, for and for have been measured. The spectra were recorded at a wavelength of 266 nm (4.657 eV) and yield electron affinities for each species. The spectra are vibrationally resolved, and some of the vibrational modes in the neutral radicals are assigned. In addition, photoelectron angular distributions allow one to distinguish between photodetachment transitions to the and states of the neutrals. The spectra confirm previous work showing that and have ground states, while and have ground states. In addition, we observe the low-lying or excited states for all four radicals. The photoelectron angular distributions also serve as a probe of vibronic coupling between the and states. These effects are particularly prominent in the and spectra.
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Research Article| June 22 1998
Photoelectron spectra of the and anions
Travis R. Taylor;
Travis R. Taylor, Cangshan Xu, Daniel M. Neumark; Photoelectron spectra of the and anions. J. Chem. Phys. 22 June 1998; 108 (24): 10018–10026. https://doi.org/10.1063/1.476462
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