Title
Binary and ternary recombination of H-3(+) and D-3(+) ions with electrons in low temperature plasma
Abbreviated Journal Title
Mol. Phys.
Keywords
H-3(+) and O-3(+) ions; ions; binary recombination; He assisted ternary; recombination; plasma; afterglow; lifetime of Rydberg molecule; DISSOCIATIVE RECOMBINATION; INFRARED-SPECTRUM; INTERSTELLAR; AFTERGLOW; H-3+; SPECTROSCOPY; EXCITATION; HCO+; COEFFICIENTS; DEPENDENCE; Physics, Atomic, Molecular & Chemical
Abstract
Measurements of recombination rate coefficients of binary and ternary recombination of H-3(+) and D-3(+) ions with electrons in a low temperature plasma are described. The experiments were carried out in the afterglow plasma in helium with a small admixture of Ar and parent gas (H-2 or D-2). For both ions a linear increase of measured apparent binary recombination rate coefficients (alpha(eff)) with increasing helium density was observed: alpha(eff) = alpha(BIN) + K-He[He]. From the measured dependencies, we have obtained for both ions the binary (alpha(BIN)) and the ternary ( KHe) rate coefficients and their temperature dependence. For the description of observed ternary recombination a mechanism with two subsequent rate determining steps is proposed. In the first step, in H-3(+) + e(-) (or D-3(+) + e(-)) collision, a rotationally excited long-lived Rydberg molecule H-3(*) (or D-3(*)) is formed. In the following step H-3(*) (or D-3(*)) collides with a He atom of the buffer gas and this collision prevents autoionization of H-3(*) (or D-3(*)). Lifetimes of the formed H-3(*) (or D-3(*)) and corresponding ternary recombination rate coefficients have been calculated. The theoretical and measured binary and ternary recombination rate coefficients obtained for H-3(+) and D-3(+) ions are in good agreement.
Journal Title
Molecular Physics
Volume
108
Issue/Number
17
Publication Date
1-1-2010
Document Type
Article
Language
English
First Page
2253
Last Page
2264
WOS Identifier
ISSN
0026-8976
Recommended Citation
"Binary and ternary recombination of H-3(+) and D-3(+) ions with electrons in low temperature plasma" (2010). Faculty Bibliography 2010s. 190.
https://stars.library.ucf.edu/facultybib2010/190
Comments
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