Collision-induced photon emissions from 8 keV polyatomic ions of composition C2,H4,O+• and C2,H5,Cl+•

Eur. J. Mass Spectrom. 1, 23–31 (1995)
DOI: 10.1255/ejms.156

Collision-induced photon emissions from 8 keV polyatomic ions of composition C₂,H₄,O^+• and C₂,H₅,Cl^+•

J.L. Holmes^* and P.M. Mayer
Chemistry Department, University of Ottawa, Ottawa, Canada K1N 6N5

ABSTRACT:

Photon emissions following 8 keV ion beam-target gas collisions of the polyatomic cations of composition C₂,H₄,O^+• and C₂,H₅,Cl^+• were measured and interpreted in conjunction with their collision induced dissociation (CID) mass spectra. The experiments were performed in a modified analytical VG ZAB-2F mass spectrometer of magnetic sector/electric sector/electric sector (BEE) geometry. The identification of the emission bands in the collision-induced emission (CIE) spectra of oxirane^+•, acetaldehyde^+• and vinyl alcohol^+• with helium and argon target gases was assisted by obtaining the CIE spectra of CO^+•, HCO⁺ and CH₃⁺. Distinct emission bands due to the HC (A,B -> X), HC⁺ (B -> A and A – >X) and HO^• (A -> X) transitions, as well as atomic C, O⁺and H^• lines, were observed. The emission spectra of 8 keV CH₃CH₂Cl^+• and CH₃ClCH₂^+• helium and argon target gas collisions were obtained and analyzed with the aid of the CIE spectra for CCl⁺ and CH₂Cl⁺. Many of the same bands appeared as for the C₂,H₄,O^+• isomers, with the addition of bands due to the CCl⁺ (A -> X)transition and Cl⁺ atomic lines.

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