title: Slow electron velocity-map imaging spectroscopy of the 1-propynyl radical.
abstract: High resolution photoelectron spectra of the 1-propynyl and 1-propynyl-d(3) anions acquired with slow electron velocity-map imaging are presented. The electron affinity is determined to be 2.7355+/-0.0010 eV for the 1-propynyl radical and 2.7300+/-0.0010 eV for 1-propynyl-d(3). Several vibronic transitions are observed and assigned using the isotopic shifts and results from ab initio calculations. Good agreement between experimental spectra and calculations suggests a C(3v) geometry for the 1-propynyl radical. No evidence is found for strong vibronic coupling between the ground electronic state and the low-lying first excited state.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, USA.
authors.forename: Jia
authors.initials: J
authors.lastname: Zhou
authors.forename: Etienne
authors.initials: E
authors.lastname: Garand
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Eisfeld
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark