Title

Binary and ternary recombination of D-3(+) ions with electrons in He-D-2 plasma

Authors

Authors

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

Comments

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Abbreviated Journal Title

Phys. Rev. A

Keywords

DISSOCIATIVE RECOMBINATION; H-3(+) IONS; AFTERGLOW PLASMA; RYDBERG; STATES; COLLISIONS; HCO+; GAS; INTERSTELLAR; DEPENDENCE; PRESSURE; Optics; Physics, Atomic, Molecular & Chemical

Abstract

An experimental study is reported about the recombination of D-3(+) ions with electrons in a low-temperature plasma (200-300K) consisting of He with a small admixture of D-2. At several temperatures, the pressure dependence of the apparent binary recombination rate coefficient (alpha(eff)) was measured over a broad range of helium pressures (200-2000 Pa). The binary and ternary recombination rate coefficients were obtained from measured pressure dependences of alpha(eff). The binary recombination rate coefficient obtained alpha(bin)(300 K) = (2.7 +/- 0.9) x 10(-8) cm(3) s(-1) is in agreement with recent theory. The ternary recombination rate coefficient obtained is K-He(300 K) = (1.8 +/- 0.6) x 10(-25) cm(6) s(-1). In analogy with the recently described process of helium-assisted ternary recombination of H-3(+) ions, it is suggested that the ternary helium- assisted recombination of D-3(+) ions proceeds through the formation of a neutral long- lived highly excited Rydberg molecule D-3 followed by a collision with a He atom.

Journal Title

Physical Review A

Volume

80

Issue/Number

4

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000271351000101

ISSN

1050-2947

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