Title

Dissociative recombination of H-3(+) in the ground and excited vibrational states

Authors

Authors

S. F. dos Santos; V. Kokoouline;C. H. Greene

Comments

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Abbreviated Journal Title

J. Chem. Phys.

Keywords

POTENTIAL-ENERGY SURFACE; ELECTRON-IMPACT; ROTATIONAL-EXCITATION; RYDBERG SERIES; MOLECULAR-IONS; STORAGE-RING; SPECTROSCOPY; DESTRUCTION; DYNAMICS; H-3+; Physics, Atomic, Molecular & Chemical

Abstract

The article presents calculated dissociative recombination (DR) rate coefficients for H-3(+). The previous theoretical work on H-3(+) was performed using the adiabatic hyperspherical approximation to calculate the target ion vibrational states and it considered just a limited number of ionic rotational states. In this study, we use accurate vibrational wave functions and a larger number of possible rotational states of the H-3(+) ground vibrational level. The DR rate coefficient obtained is found to agree better with the experimental data from storage ring experiments than the previous theoretical calculation. We present evidence that excited rotational states could be playing an important role in those experiments for collision energies above 10 meV. The DR rate coefficients calculated separately for ortho- and para-H-3(+) are predicted to differ significantly at low energy, a result consistent with a recent experiment. We also present DR rate coefficients for vibrationally excited initial states of H-3(+), which are found to be somewhat larger than the rate coefficient for the ground vibrational level. (C) 2007 American Institute of Physics.

Journal Title

Journal of Chemical Physics

Volume

127

Issue/Number

12

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000249787300021

ISSN

0021-9606

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