Recombination of Oxygen Atoms in the Absence of O2

Morgan, J. E.; Elias, L.; Schiff, H. I.

doi:10.1063/1.1731292

Cited by 35 publications

(9 citation statements)

References 7 publications

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“…Figure 1 summarizes the results from all five previous direct measurements of the O + O + N 2 → O 2 + N 2 rate coefficient, performed between 1960 and 1973 [ Barth , 1961; Campbell and Gray , 1973; Campbell and Thrush , 1967; Morgan et al , 1960; Morgan and Schiff , 1963]. All but two investigations [ Campbell and Gray , 1973; Campbell and Thrush , 1967] have been performed only at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Laboratory determination of the rate coefficient for three‐body recombination of oxygen atoms in nitrogen

et al. 2008

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[1] A laser-based measurement of the rate coefficient for O-atom three-body recombination at room temperature is reported. The experiment employs the pulsed output of a fluorine laser at 157.6 nm to achieve high degrees of photodissociation of molecular oxygen. In a high-pressure (1 atm) background of N 2 , the produced oxygen atoms recombine in a timescale of several milliseconds. The O-atom population is monitored by two-photon laser-induced fluorescence at 845 nm, using a second laser with output near 226 nm. The measured value of the rate coefficient is (2.7 ± 0.3) Â 10 À33 cm 6 s À1 (1s uncertainty), a value a factor of 2 lower than that currently adopted by the atmospheric modeling community.

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Section: Introductionmentioning

confidence: 99%

Laboratory determination of the rate coefficient for three‐body recombination of oxygen atoms in nitrogen

et al. 2008

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“…In the first of these it is proposed that the reaction is the only one of importance in the nitric oxide system, and that the lower yield of hydrogen cyanide from ethylene arises from some inherent inefficiency in the ethylene reaction ( 1 0 , l l ) . The nitric oxide reaction has been studied by following the disappearance of nitric oxide (1,12,13), the appearance of N2 (using ISNO) (3), and the formation of oxygen atoms (14), and all the data are compatible with this simple mechanism, which is also apparently supported by recent estimates of atom concentration by electron spin resonance methods (5), and by measurement of the pressure change on combination (15). In the second category of explanations, it is suggested that in the presence of a sufficient excess of ethylene, the reactions…”

Section: Introductionmentioning

confidence: 66%

The Reaction of Active Nitrogen With Mixtures of Ethylene and Nitric Oxide

Fersht¹,

Back²

1965

Can. J. Chem.

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The reaction of active nitrogen, produced in a condensed discharge a t 1 mm pressure, with mixtures of ethylene and nitric oxide has been studied with mixtures ranging in composition from pure ethylene t o pure nitric oxide. The sum of H C N + 1 4 N W produced from mixtures of CzH4 and 15N0 remained constant and equal to the HCN produced from pure C2H4 for NO concentrations up t o 50 mole %. As more NO was added, this sum rose towards the value of 14N15N produced from pure 15N0. These data appear to lend support t o the HCN yield from ethylene as the true measure of nitrogen atom concentration. I t is suggested that l5NO also undergoes a concerted reaction with excited 14N14N molecules, probably in the A3 &+ state, t o produce "N16N, and that these excited molecules can be quenched by collision with ethylene or methane without consuming nitrogen or forming HCN.

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“…Dashed line: recommendation by Roble (1995), adopted by the atmospheric modeling community. Open circle: measurement by Morgan et al (1960). Open down triangle: measurement by Barth (1961).…”

Section: Three-body Recombination Of Oxygen Atomsmentioning

confidence: 99%