[en] It is shown that for a photon energy of 16.85 eV the translational energy surprisal of the C2H3++F dissociation products from C2H3F+ has a bimodal behaviour. The possibility of considering the bimodal surprisal as due to the superposition of two translational energy distributions is consistent with the theoretical assumption of the concurrence of two channels in this dissociation process. The characteristics of these distributions, i.e. the energy width and the relative abundance, are in agreement with the results of an ab initio quantum-mechanical calculation of the dynamics of this dissociation. They are consistent with the simultaneous occurrence of a statistical dissociation of C2H3F+(X2A') into C2H3+(X1A') and an isolated state dissociation of C2H3F+(C2A") into C2H3+(a3A"). Negative lambda values obtained for the surprisal of both these distributions indicate an inversion of the translational level population of the dissociation products.
Research Center/Unit :
Laboratoire de Dynamique Moléculaire
Disciplines :
Chemistry
Author, co-author :
Momigny, J.
Locht, Robert ; Université de Liège - ULiège > Département de Chimie (Faculté des sciences) > Laboratoire de Dynamique Moléculaire (Sciences)
Language :
English
Title :
The Appearance of C2H3+ Ions from C2H3F by non-resonant Photoionization. A Translational Energy Surprisal Analysis.
Alternative titles :
[fr] L'apparition des ions C2H3+ à partir de C2H3F par photoionisation non-résonante. Une analyse de la surprise de l'énergie translationnelle.
Publication date :
1993
Journal title :
Chemical Physics Letters
ISSN :
0009-2614
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
211
Issue :
2,3
Pages :
161-165
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ARC, FRFC
Commentary :
- Printed version of reprint available on request
- Version imprimée du tiré-à-part disponible sur demande
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Bibliography
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Shaul, Haas, Kompa, Levine (1981) Springer series in chemical physics. Lasers and chemical change , Springer, Berlin; 10.
Locht, Schopman Intern. J. Mass Spectrom. Ion Phys. 1974, 15:361.
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Locht, Momigny Intern. J. Mass Spectrom. Ion Processes 1986, 71:141.
Lifshitz (1982) A surprisal analysis of the dissociation dynaimics of C3H6O+ cations. International Journal of Mass Spectrometry and Ion Physics 43:179.
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