Unimolecular Dissociation of H<sup>+</sup><sub style="margin-left:-6px;">2n+1</sub>Hydrogen Clusters: Measured Cross Sections and Theoretically Calculated Rate Constants
Unimolecular Dissociation of H<sup>+</sup><sub style="margin-left:-6px;">2n+1</sub>Hydrogen Clusters: Measured Cross Sections and Theoretically Calculated Rate Constants作者机构：Laboratoire Physique de la Matière Condensée (URAC10) Université Hassan II Mohammedia Morocco
出 版 物：《World Journal of Condensed Matter Physics》 (凝固态物理国际期刊（英文）)
年 卷 期：2013年第3卷第4期
页 面：207-215页
主 题：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
摘 要：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.
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