title: Ternary recombination of H3(+) and D3(+) with electrons in He-H2 (D2) plasmas at temperatures from 50 to 300 k.
abstract: We present results of plasma afterglow experiments on ternary electron-ion recombination rate coefficients of H3(+) and D3(+) ions at temperatures from 50 to 300 K and compare them to possible three-body reaction mechanisms. Resonant electron capture into H3* Rydberg states is likely to be the first step in the ternary recombination, rather than third-body-assisted capture. Subsequent interactions of the Rydberg molecules with ambient neutral and charged particles provide the rate-limiting step that completes the recombination. A semiquantitative model is proposed that reconciles several previously discrepant experimental observations. A rigorous treatment of the problem will require additional theoretical work and experimental investigations.
authors: Department of Physics and Astronomy, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States.
authors: R
authors: R
authors: Johnsen
authors: P
authors: P
authors: Rubovič
authors: P
authors: P
authors: Dohnal
authors: M
authors: M
authors: Hejduk
authors: R
authors: R
authors: Plašil
authors: J
authors: J
authors: Glosík