Temperature dependence of binary and ternary recombination of D-3(+) ions with electrons
Abbreviated Journal Title
J. Chem. Phys.
PRESSURE FLOWING AFTERGLOW; DISSOCIATIVE RECOMBINATION; H-3(+) IONS; ROTATIONAL-EXCITATION; INFRARED-SPECTRUM; MOLECULAR-IONS; PLASMA; GAS; SPECTROSCOPY; INTERSTELLAR; Physics, Atomic, Molecular & Chemical
Flowing and stationary afterglow experiments were performed to study the recombination of D-3(+) ions with electrons at temperatures from 77 to 300 K. A linear dependence of apparent (effective) binary recombination rate coefficients on the pressure of the helium buffer gas was observed. Binary (D-3(+)+e(-)) and ternary (D-3(+)+e(-)+He) recombination rate coefficients were derived. The obtained binary rate coefficient agrees with recent theoretical values for dissociative recombination of D-3(+). We describe the observed ternary process by a mechanism with two rate determining steps. In the first step, a rotationally excited long-lived neutral D-3* is formed in D-3(+)-e(-) collisions. As the second step, the D-3* collides with a helium atom that prevents autoionization of D-3*. We calculate lifetimes of D-3* formed from ortho-, para-, or metastates of D-3(+) and use the lifetimes to calculate ternary recombination rate coefficients. (C) 2010 American Institute of Physics. [doi:10.1063/1.3457940]
Journal of Chemical Physics
"Temperature dependence of binary and ternary recombination of D-3(+) ions with electrons" (2010). Faculty Bibliography 2010s. 381.