0181726 - UFCH-W 20030160 RIV NL eng J - Journal Article
Qayyum, A. - Tepnual, T. - Mair, C. - Matt-Leubner, S. - Scheier, P. - Herman, Zdeněk - Märk, T. D.
The Role of Internal Energy of Polyatomic Projectile Ions in Surface Induced Dissociation.
Chemical Physics Letters. Roč. 376, - (2003), s. 539-547. ISSN 0009-2614. E-ISSN 1873-4448
R&D Projects: GA ČR GA203/00/0632
Institutional research plan: CEZ:AV0Z4040901
Keywords : electron-impact ionization * carbon surfaces * collisions
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.438, year: 2003

The effect of initial internal energy on the extent of surface-induced fragmentation was investigated in a tandem mass spectrometer for CH3+ and CH4+ ions prepared in different ion sources. The different initial internal energy content had a considerable effect on the extent of fragmentation of the surface-excited projectile ions: ions from a Nier source with a large amount of initial internal energy fragmented at much lower collision energies than internally relaxed projectile ions from a Colutron source. A quantitative estimation of this effect showed that the initial internal energy content of the projectile ions was entirely preserved in the projectile ion during the ion/surface collision.
Permanent Link: http://hdl.handle.net/11104/0001928