"Recombination in Plasmas with Different Populations of Para and Ortho H3+"@en . . "RIV/00216208:11320/10:10080641" . . . . . "P(GA202/07/0495), P(GA202/09/0642), P(GA205/09/1183), P(GD202/08/H057), S, Z(MSM0021620834)" . . "para-hydrogen; H3+; infra-red spectroscopy; CRDS; plasma"@en . "RIV/00216208:11320/10:10080641!RIV11-GA0-11320___" . . "Recombination in Plasmas with Different Populations of Para and Ortho H3+" . . . "7"^^ . . . . . "Glos\u00EDk, Juraj" . "Varju, Jozef" . "[C8B796DE4FB3]" . "7"^^ . "Praha" . "Praha" . "Recombination in Plasmas with Different Populations of Para and Ortho H3+"@en . "Kotr\u00EDk, Tom\u00E1\u0161" . "284201" . . "J\u00EDlek, Mojm\u00EDr" . . "Matfyzpress" . . . . "Recombination in Plasmas with Different Populations of Para and Ortho H3+" . "We present a study of spin-dependent recombination of H3+ ions with electrons at 77 K. A near infrared continuous wave cavity ring down spectrometer (cw-CRDS) was employed to obtain concentration evolutions of the two lowest rotational states of H3+, which have different nuclear spin (ortho and para). From the measured decrease of para-H3+ and ortho-H3+ densities during the afterglow, the effective recombination rate coefficient of H3+ was determined. Using para enriched hydrogen gas changed the [para-H3+]:[ortho-H3+] ratio. From effective recombination rate coefficients, obtained at different ortho/para ratios, the recombination rate coefficients for individual spin states were calculated. The obtained individual values of the binary recombination rate coefficients are $^p\\alpha_{bin} = (1.75\\pm0.4)\\times10^{-7} cm^3s^{-1}$ and $^o\\alpha_{bin} = (5\\pm3)\\times10^{-8} cm^3s{-1}$ for para-H3+ and ortho-H3+, respectively. Both values are in agreement with theoretical predictions."@en . "11320" . "6"^^ . . . . "978-80-7378-140-8" . . "Pla\u0161il, Radek" . . . . . . "2010-06-01+02:00"^^ . . "Dohnal, Petr" . "We present a study of spin-dependent recombination of H3+ ions with electrons at 77 K. A near infrared continuous wave cavity ring down spectrometer (cw-CRDS) was employed to obtain concentration evolutions of the two lowest rotational states of H3+, which have different nuclear spin (ortho and para). From the measured decrease of para-H3+ and ortho-H3+ densities during the afterglow, the effective recombination rate coefficient of H3+ was determined. Using para enriched hydrogen gas changed the [para-H3+]:[ortho-H3+] ratio. From effective recombination rate coefficients, obtained at different ortho/para ratios, the recombination rate coefficients for individual spin states were calculated. The obtained individual values of the binary recombination rate coefficients are $^p\\alpha_{bin} = (1.75\\pm0.4)\\times10^{-7} cm^3s^{-1}$ and $^o\\alpha_{bin} = (5\\pm3)\\times10^{-8} cm^3s{-1}$ for para-H3+ and ortho-H3+, respectively. Both values are in agreement with theoretical predictions." . "WDS'10 Proceedings of Contributed Papers: Part II - Physics of Plasmas and Ionized Media" . . . "Hejduk, Michal" .