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Identification of Impurities in Phenylacetylene by Species-Selected Mass-Analyzed Threshold Ionization Spectroscopy

Volume 57, Number 9 (Sept. 2003) Page 1178-1182

Lin, Jung Lee; Tzeng, Wen Bih

Two-color resonant two-photon mass-analyzed threshold ionization (MATI) spectroscopy was used to identify styrene impurities in a commercial phenylacetylene sample. With the mass-gating setup, the recorded MATI spectra are free of contamination from molecules of different mass. Analysis of these spectra gives information on the precise adiabatic ionization and the active cation vibrations, which can be used as fingerprints for the identification of molecular ions.