Predissociation and its inverse, using resonance absorption NO(C 2Π) ⇄ N+O

Abstract

Radiative recombination of N+O has been investigated by using this radiation as a highly specific light source for dissociation of NO. This direct proof of predissociation of NO(C 2Π) supports previous indirect evidence. Measurements of the rate of N2 production in the photodissociation lead to a rate coefficient for the process N+O ⇄ NO(C 2Π, v′ = 0) → NO(X 2Π, v″ = 0) + hν, kδ0,0 = (2.9 ± 0.5) × 10−18 cm3 sec−1 at 300°K. The total rate coefficient summed over v″ is (1.5 ± 0.4) × 10−17 cm3 sec.−1 When N and O concentrations are measured by titration, the recombination emission can be used as an absolute intensity standard (±20%) at 1900 Å.

The impact of the chlorocarbon industry on the ozone layer

“…The adopted solar irradiance data are taken from A ckerman [1971 ], the recent revisions by Simon [1974] being applied. The adopted dissociation cross sections for all chlorine-free compounds are the same as those used by Crutzen [1974a] with the exception of NO, for which dissociation rates are lowered by a factor of 2.5 [Mandelman et al, 1973] from the values given by Cieslik and Nicolet [1973]. Watson [1976] has reviewed and compiled kinetic and photochemical data pertaining to most of the chemistry of relevance to this study.…”

NO emissions as observed by SPICAV during stellar occultations

“…NO is thus a tracer of the descending branch of the SSAS circulation . The emission process is a two body radiative recombination between O( 3 P) and N( 4 S) atoms, yielding excited NO* molecules which relax by emitting the ultraviolet d and g bands (Mandelman et al, 1973;Gé rard et al, 2008;Cox et al, 2008): …”

Observation of Strong NO Gamma-Band Radiation Induced in Thin N2-CO2and N2-H2O Targets by Electron Impact and Its Possible Relation to the Auroral Chemistry of NO

“…Atomic oxygen is also a minor product of e-HzO dissociative collisions. 'The free oxygen atoms can contribute to NO for-mation through the three-body recombination process [2] N…”