O(1D)/N2O branching ratio at 290 K

A photoelectric detector for the measurement of photolysis frequencies of ozone and other atmospheric molecules

“…An overview about the recent publications is given in Table III. The dependence on the addition of excess He, as was observed by Davidson et al (1979), Volltrauer et al (1979), and Simonaitis et al (1972), was attributed to the more rapid thermalization of the hot O(ID) atoms formed in reaction (1) Simonaitis et al (1972) 0.69 ± 0.05 pure N20 0.83 ± 0.06 He/N20 mixture Ghormley et aL (t973) 0.70±0.02 Volltrauer et al (1979) 0.73 ± 0.11 pure N20 0.92 ± 0.1 He/N20 mixture Davidson et al (1979) 0.68 ± 0.1 pure N20 0.80 ± 0.1 He/N20 mixture Marx et al (1979) 0.62 ± 0.04 He/N~O mixture no He effect observed Lam el al. (1981) 0.62 ±0.2 pure N20 and He/N20 no He effect observed 225 little excess kinetic energy.…”

Formation of O(3P) Atoms in the Photolysis of N2O at 193 nm and O(3P) + N2O Product Channel in the Reaction of O(1D) + N2O

“…The latest NASA/JPL panel in 2003 recommends the rate constants of k 2a = 6.7 × 10 -11 and k 2b = 4.9 × 10 -11 cm 3 molecule -1 s -1 at 298 K for use in stratospheric modeling studies . The individual product formation rates for the O( 1 D) + N 2 O reaction in the NASA/JPL recommendations 3 are based on four experimental studies on the branching ratio measurements performed by Davidson et al, Volltrauer et al, Marx et al, and Lam et al The three studies of them measured the k 2a / k 2b value by detecting the reaction products of NO for channel 2a and N 2 or O 2 for channel 2b using the methods such as gas chromatography, chemiluminescence detection, and mass spectrometry. − Their values of k 2a / k 2b have been used to yield the R 2a (≡ k 2a / k 2 ) value recommended in the NASA/JPL panel 3 on the assumption that only channels 2a and 2b are available as the products in the O( 1 D) + N 2 O reaction. In this study, the channel 2c branching ratio has been determined to be 0.04 ± 0.02.…”

“…3 The individual product formation rates for the O( 1 D) + N 2 O reaction in the NASA/ JPL recommendations 3 are based on four experimental studies on the branching ratio measurements performed by Davidson et al, 30 Volltrauer et al, 31 Marx et al, 32 and Lam et al 33 The three studies of them measured the k 2a /k 2b value by detecting the reaction products of NO for channel 2a and N 2 or O 2 for channel 2b using the methods such as gas chromatography, chemiluminescence detection, and mass spectrometry. [30][31][32] Their values of k 2a /k 2b have been used to yield the R 2a (≡k 2a /k 2 ) value recommended in the NASA/JPL panel 3 on the assumption that only channels 2a and 2b are available as the products in the O( 1 D) + N 2 O reaction. In this study, the channel 2c branching ratio has been determined to be 0.04 ( 0.02.…”

Environmental effects of large igneous province magmatism: a Siberian perspective

“…The branching ratio for the reaction of O( 1 D) with N 2 O to give N 2 + O 2 or NO + NO is an average of the values reported by Davidson et al [350]; Volltrauer et al [1381]; Marx et al [885] and Lam et al [763], with a spread in R=k(NO + NO)/k(Total) = 0.52 -0.62. Cantrell et al [229] reported a measurement of R=0.…”