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Surface-induced dissociation of H3+ and C4H10+ on Pt(111) and CH+ on Cu(111)

Lookup NU author(s): Professor Ken Snowdon, Adam Golichowski


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The interaction of 6 keV CH+ with a Cu(111) surface and 3 keV H3+ and 2.3 keV C4H10+ with a Pt(111) surface under glancing incidence conditions (surface normal energies of 0.7 eV and 4 eV) is examined. In this geometry, the contribution of the direct "collision induced" dissociation mechanisms is minimal. We find strong evidence for direct dissociation of H3+ via charge capture to the dissociative 2p, 2E′ ground state. The surface-induced dissociation of CH+ and C4H10+ appears to proceed via two steps, namely charge capture to a bound state of the neutral molecule, followed by the transfer of translational energy into a vibrational co-ordinate of the molecule. We propose that this T-V energy transfer occurs via repeated inelastic electron scattering events. © 1998 Elsevier Science B.V.

Publication metadata

Author(s): Snowdon KJ, Golichowski AP, Harder R, Nesbitt A

Publication type: Article

Publication status: Published

Journal: International Journal of Mass Spectrometry and Ion Processes

Year: 1998

Volume: 174

Issue: 1-3

Pages: 73-80

Print publication date: 01/03/1998

ISSN (print): 0168-1176

ISSN (electronic): 1873-2798

Publisher: Elsevier BV


DOI: 10.1016/S0168-1176(97)00291-7


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