Title

Temperature dependence of binary and ternary recombination of D-3(+) ions with electrons

Authors

Authors

T. Kotrik; P. Dohnal; I. Korolov; R. Plasil; S. Roucka; J. Glosik; C. H. Greene;V. Kokoouline

Comments

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Abbreviated Journal Title

J. Chem. Phys.

Keywords

PRESSURE FLOWING AFTERGLOW; DISSOCIATIVE RECOMBINATION; H-3(+) IONS; ROTATIONAL-EXCITATION; INFRARED-SPECTRUM; MOLECULAR-IONS; PLASMA; GAS; SPECTROSCOPY; INTERSTELLAR; Physics, Atomic, Molecular & Chemical

Abstract

Flowing and stationary afterglow experiments were performed to study the recombination of D-3(+) ions with electrons at temperatures from 77 to 300 K. A linear dependence of apparent (effective) binary recombination rate coefficients on the pressure of the helium buffer gas was observed. Binary (D-3(+)+e(-)) and ternary (D-3(+)+e(-)+He) recombination rate coefficients were derived. The obtained binary rate coefficient agrees with recent theoretical values for dissociative recombination of D-3(+). We describe the observed ternary process by a mechanism with two rate determining steps. In the first step, a rotationally excited long-lived neutral D-3* is formed in D-3(+)-e(-) collisions. As the second step, the D-3* collides with a helium atom that prevents autoionization of D-3*. We calculate lifetimes of D-3* formed from ortho-, para-, or metastates of D-3(+) and use the lifetimes to calculate ternary recombination rate coefficients. (C) 2010 American Institute of Physics. [doi:10.1063/1.3457940]

Journal Title

Journal of Chemical Physics

Volume

133

Issue/Number

3

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000280596900027

ISSN

0021-9606

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