TITLE:
Unimolecular Dissociation of H+2n+1 Hydrogen Clusters: Measured Cross Sections and Theoretically Calculated Rate Constants
AUTHORS:
Mohamed Tabti, Adil Eddahbi, Soufiane Assouli, Lahcen El Arroum, Said Ouaskit
KEYWORDS:
RRKM; Rice-Ramsperger-Kassel-Marcus; Direct Count Method; Classical Method; Whitten-Rabinovitch Method; High-Energy Cluster Collision; Fragmentation Phenomena; Cluster Fragmentation; Ionic Hydrogen Clusters; Ion-Atom Collisions; Ionic Cluster; Cross Sections; Molecular Dissociation; Size Effect; Metastable States; Hydrogen Ions
JOURNAL NAME:
World Journal of Condensed Matter Physics,
Vol.3 No.4,
November
19,
2013
ABSTRACT:
In this paper, we studied the process of dissociation unimolecular of the evaporation of H+2n+1 hydrogen clusters according to size, using the Rice-Ramsperger-Kassel-Marcus (RRKM) theory. The rate constants k(E) were determined with the use of statistical theory of unimolecular reactions using various approximations. In our work, we used the products frequencies instead of transitions frequencies in the calculation of unimolecular dissociation rates obtained by three models RRKM. The agreement between the experimental cross section ratio and calculated rate ratio with direct count approximation seems to be reasonable.