Nonequilibrium velocity distributions and recombination rates in electron-- ion and ion--ion recombinations in weakly ionized gases

Journal Article · Wed Oct 15 00:00:00 EDT 1975 · J. Chem. Phys., v. 63, no. 8, pp. 3302-3306

DOI:https://doi.org/10.1063/1.431817· OSTI ID:4198945

Koura, K

The nonequilibrium velocity distributions and recombination rates in electron--ion and ion--ion recombinations in a heat bath of neutral molecules are investigated by solving the Boltzmann equation with the Monte Carlo simulation. The explicit time-dependent velocity distributions and recombination rates from the initial equilibrium to quasisteady states are obtained for the typical electron--ion dissociative recombination e+N$sup +$$sub 2$$Yields$N+N in the heat bath of N$sub 2$ and for the typical ion--ion recombination H$sup +$+H$sup -$ $Yields$H+H in the heat bath of H$sub 2$. The velocity distributions and the recombination rates indicate significant deviations from equilibrium. The decreases in the recombination rates from the equilibrium rates are 30% for e+N$sup +$$sub 2$$Yields$N+N and 15% for H$sup +$+H$sup -$$Yields$H+H at quasisteady states for the heat bath temperature 300 degreeK and the charge concentrations Xapprox.10$sup -4$ and 10$sup -2$, respectively. The Monte Carlo result is compared with the Chapman--Enskog solution by Shizgal and Karplus for H$sup +$+H$sup -$$Yields$H+H. The Chapman--Enskog solution indicates a too large nonequilibrium for high charge concentration X>10$sup -4$.

• Research Organization: National Aerospace Laboratory, Chofu, Tokyo, Japan
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-003965
• OSTI ID: 4198945
• Journal Information: J. Chem. Phys., v. 63, no. 8, pp. 3302-3306, Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

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*HYDROGEN IONS 1 PLUS- RECOMBINATION
*NITROGEN IONS- RECOMBINATION
BOLTZMANN EQUATION
CHEMICAL REACTION KINETICS
MONTE CARLO METHOD