Reference : Dissociative Autoionization as a Mechanism for the Proton Formation from Methane and ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Dissociative Autoionization as a Mechanism for the Proton Formation from Methane and Methane-d4 by low energy Electron Impact.
[fr] L'autoionisation dissociative comme mécanisme de formation du proton à partir du Méthane et du Méthane-d4 par impact d'électrons de faible énergie.
Locht, Robert mailto [Université de Liège - ULiège > Département de Chimie (Faculté des sciences) > Laboratoire de Dynamique Moléculaire (Sciences) > >]
Olivier, J. L. [ > > ]
Momigny, J. [ > > ]
Chemical Physics
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[en] Electron impact ; Kinetic energy distribution ; Appearance energy ; Dissociative autoionization ; H+/CH4 ; D+/CD4
[en] The ion energy distribution and the electroionization efficiency curves of H+ and D+ from methane and methane-d4 have been examined. The existence of thermal ions is unambiguously evidenced and the two lowest appearance thresholds of H+ are measured at (21.3+/-0.3) eV and (22.17+/-0.1) eV. At both energies the protons have to be formed through dissociative autoionization. The present results closely parallel those of the dissociative excitation experiments on methane. The Jortner-Rice model for dissociation of polyatomic molecules is invoked to account for both the appearance of H+ and high-Rydberg H atoms from CH4.
Laboratoire de Dynamique Moléculaire
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