This paper is a detailed critical review of the production processes and reactions of N, N+, N+2 , N++, and N++2 of relevance to Titan’s atmosphere. The review includes neutral, ion–molecule, and recombination reactions. The review covers all possible active nitrogen species under Titan’s atmospheric conditions, specifically N2 (A 3Σ+u), N (4S), N (2D), N (2P), N+2 , N+ (3P), N+ (1D), N++2 , and N++ species, and includes a critical survey of the reactions of N, N+, N+2 , N++, and N++2 with N2, H2, D2, CH4, C2H2, C2H4, C2H6, C3H8 and the deuterated hydrocarbon analogs, as well as the recombination reactions of N+2 , N+, N++2, and N++. Production processes, lifetimes, and quenching by collisions with N2 of all reactant species are reviewed. The N (4S) state is reactive with radicals and its reactions with CH2, CH3, C2H3, and C2H5 are reviewed. Metastable states N2 (A 3Σ+u), N (2D), and N (2P) are either reactive or quenched by collisions with the target molecules reviewed. The reactions of N+ (1D) have similar rate constants as N+ (3P), but the product branching ratios differ significantly. Temperature effects and the role of the kinetic energy content of reactants are investigated. In all cases, experimental uncertainties of laboratory data are reported or estimated. Recommended values with uncertainties, or estimated values when no data are available, are given for rate constants and product branching ratios at 300 K and at the atmospheric temperature range of Titan (150–200 K for neutral reactions and 150 K for ion reactions)

Dutuit, O.; Carrasco, N.; Thissen, R.; Vuitton, V.; Alcaraz, C.; Pernot, P.; Balucani, N.; Casavecchia, P.; Canosa, A.; Le Picard, S.; Loison, J.C.; Herman, Z.; Zabka, J.; Ascenzi, D.; Tosi, P.; Franceschi, P.; Price, S.D.; Lavvas, P. (2013). Critical review of N, N+, N2+, N++ and N2++ main production processes and reactions ofrelevance to Titan’s atmosphere. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 204 (2): 1-45. doi: 10.1088/0067-0049/204/2/20 handle: http://hdl.handle.net/10449/23474

Critical review of N, N+, N2+, N++ and N2++ main production processes and reactions ofrelevance to Titan’s atmosphere

Franceschi, Pietro;
2013-01-01

Abstract

This paper is a detailed critical review of the production processes and reactions of N, N+, N+2 , N++, and N++2 of relevance to Titan’s atmosphere. The review includes neutral, ion–molecule, and recombination reactions. The review covers all possible active nitrogen species under Titan’s atmospheric conditions, specifically N2 (A 3Σ+u), N (4S), N (2D), N (2P), N+2 , N+ (3P), N+ (1D), N++2 , and N++ species, and includes a critical survey of the reactions of N, N+, N+2 , N++, and N++2 with N2, H2, D2, CH4, C2H2, C2H4, C2H6, C3H8 and the deuterated hydrocarbon analogs, as well as the recombination reactions of N+2 , N+, N++2, and N++. Production processes, lifetimes, and quenching by collisions with N2 of all reactant species are reviewed. The N (4S) state is reactive with radicals and its reactions with CH2, CH3, C2H3, and C2H5 are reviewed. Metastable states N2 (A 3Σ+u), N (2D), and N (2P) are either reactive or quenched by collisions with the target molecules reviewed. The reactions of N+ (1D) have similar rate constants as N+ (3P), but the product branching ratios differ significantly. Temperature effects and the role of the kinetic energy content of reactants are investigated. In all cases, experimental uncertainties of laboratory data are reported or estimated. Recommended values with uncertainties, or estimated values when no data are available, are given for rate constants and product branching ratios at 300 K and at the atmospheric temperature range of Titan (150–200 K for neutral reactions and 150 K for ion reactions)
Atomic data
Atomic processes
Molecular data
Molecular processes
Planets and satellites: atmospheres
Planets and satellites: individual (Titan)
Titano
Chimica
Reattività
Settore CHIM/02 - CHIMICA FISICA
2013
Dutuit, O.; Carrasco, N.; Thissen, R.; Vuitton, V.; Alcaraz, C.; Pernot, P.; Balucani, N.; Casavecchia, P.; Canosa, A.; Le Picard, S.; Loison, J.C.; Herman, Z.; Zabka, J.; Ascenzi, D.; Tosi, P.; Franceschi, P.; Price, S.D.; Lavvas, P. (2013). Critical review of N, N+, N2+, N++ and N2++ main production processes and reactions ofrelevance to Titan’s atmosphere. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 204 (2): 1-45. doi: 10.1088/0067-0049/204/2/20 handle: http://hdl.handle.net/10449/23474
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