Title

Binary And Ternary Recombination Of H3+ And D 3+ Ions With Electrons In Low Temperature Plasma

Keywords

afterglow; binary recombination; H3+ and O3+ ions; He assisted ternary recombination; ions; lifetime of Rydberg molecule; plasma

Abstract

Measurements of recombination rate coefficients of binary and ternary recombination of H3+ and D3+ 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 (H2 or D2). For both ions a linear increase of measured apparent binary recombination rate coefficients (αeff) with increasing helium density was observed: αeff = αBIN + KHe[He]. From the measured dependencies, we have obtained for both ions the binary (αBIN) 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 H3++ e- (or D3++ e-) collision, a rotationally excited long-lived Rydberg molecule H3* (or D 3*) is formed. In the following step H 3* (or D3*) collides with a He atom of the buffer gas and this collision prevents autoionization of H3* (or D3*). Lifetimes of the formed H3* (or D3*) and corresponding ternary recombination rate coefficients have been calculated. The theoretical and measured binary and ternary recombination rate coefficients obtained for H3+ and D3+ ions are in good agreement. © 2010 Taylor & Francis.

Publication Date

9-10-2010

Publication Title

Molecular Physics

Volume

108

Issue

17

Number of Pages

2253-2264

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/00268976.2010.507555

Socpus ID

77956532428 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77956532428

This document is currently not available here.

Share

COinS