Title

Formation of H-3(-) by radiative association of H-2 and H- in the interstellar medium

Authors

Authors

M. Ayouz; R. Lopes; M. Raoult; O. Dulieu;V. Kokoouline

Comments

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Abbreviated Journal Title

Phys. Rev. A

Keywords

POTENTIAL-ENERGY SURFACE; DER-WAALS COMPLEX; ASTRONOMICAL; IDENTIFICATION; ROTATIONAL-EXCITATION; MUTUAL NEUTRALIZATION; NEGATIVE-IONS; COLLISIONS; IRC+10216; HYDROGEN; H-+H-2; Optics; Physics, Atomic, Molecular & Chemical

Abstract

We develop the theory of radiative association of an atom and a diatomic molecule within a close-coupling framework. We apply it to the formation of H-3(-) after the low-energy collision (below 0.5 eV) of H-2 with H-. Using recently obtained potential energy and permanent dipole moment surfaces of H-3(-), we calculate the lowest rovibrational levels of the H-3(-) electronic ground state and the cross section for the formation of H-3(-) by radiative association between H- and ortho- and para-H-2. We discuss the possibility for the H-3(-) ion to be formed and observed in the cold and dense interstellar medium in an environment with a high ionization rate. Such an observation could be a probe for the presence of H- in the interstellar medium.

Journal Title

Physical Review A

Volume

83

Issue/Number

5

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000291015100006

ISSN

1050-2947

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