Charge-exchange mass spectra of CCl4, CHCl3, CH2Cl2, CH3Cl and HCl
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 75, 1648-1656
- https://doi.org/10.1039/f29797501648
Abstract
The absolute cross-sections, (Q), for the charge-exchange between positive ions of known electron recombination energies (eVi) and the neutral molecules CCl4, CHCl3, CH2Cl2, CH3Cl and HCl have been determined. The cross-sections are independent of the kinetic energy of the primary ions within the range studied. A plot of Q against eVi for each secondary ion constitutes a charge-exchange mass spectrum (CEMS) from which appearance potentials of the secondary ions have been determined: CCl+ 3(from CCl4), 11.75 ± 0.2 eV; CHCl+ 2(from CHCl3), 11.5 ± 0.2 eV; CH2Cl+ 2(from CH2Cl2), 11.3 ± 0.2 eV; CH2Cl+(from CH2Cl2), 11.9 ± 0.2 eV. The CEMS are compared with the corresponding photoelectron spectra.Keywords
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