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Anderson, J. G.

Publications and source records attributed to Anderson, J. G..

98 records · Page 6
All sourcesNASA NTRSDOE OSTI
NASA NTRS1975

The absolute concentration of O/3P/ in the earth's stratosphere

Results are presented for an experimental application of the laminar flow-through/resonance technique, which allows direct observations of the absolute concentration of atoms and radicals in the earth's upper atmosphere. Atomic resonance fluorescence was used in conjunction with a parachute-borne flow-through module deployed from a balloon at a height of 40 km to determine the concentration of ground-state atomic oxygen at 40 to 25 km in the atmosphere. The equipment is described, and the measurements and experimental uncertainties are plotted. It is shown that the observed absolute concentration of ground-state atomic oxygen is similar to that predicted by model calculations, and it is concluded that this technique provides a simple and direct means of measuring atomic and radical concentrations in the part-per-trillion range in unperturbed stratospheric samples.

Anderson, J. G.↗
NASA NTRS1975

Kinetics of the reaction OH + HNO3 yields H2O + NO3

The reaction OH + HN3 yields H2O + NO3 was studied over the temperature range 270-470 K in a flow system utilizing UV resonance fluorescence detection of OH. A temperature independent rate constant of (8.9 plus or minus 1.3) x 10 to the -14 cu cm/s was obtained, where the reported uncertainty represents a single standard deviation including estimates of systematic errors.

Margitan, J. J.↗
NASA NTRS1974

Kinetics of the reaction of OH with HCl

Measurements results are presented for the rate constant of the reaction OH + HCl yields H2O + Cl determined in a flow tube over the temperature range of 224 to 460 K using resonance fluorescence detection of OH. Stratospheric and reaction kinetic implications are briefly discussed.

Zahniser, M. S.↗
NASA NTRS1973

Kinetics of the reaction OH (v equals 0) plus O3 yields HO2 plus O2

The rate constant (kl) of the reaction OH(v=o) + O3 yields HO2 + O2 measured over the temperature range 220 to 450 K at total pressures between 2 and 5 torr using ultraviolet fluorescent scattering for the detection of OH radicals. An Arrhenius expression was obtained, and the rate constant for the reaction HO2 + O3 yields OH + 2O2 was inferred to be less than 0.1 kl over the entire temperature interval.

Anderson, J. G.↗
NASA NTRS1971

Rocket measurement of OH in the mesosphere.

A volume density profile of the OH radical throughout the 45- to 70-km region of the earth's upper atmosphere is presented. A high-resolution polarized Ebert-Fastie spectrometer flown aboard a sounding rocket was used to obtain the data. The molecule was found to have a scale height significantly greater than that of the atmosphere, with local densities of 4.4 million/cu cm at 50 km, 5.5 million/cu cm at 60 km, and 3.5 million/cu cm at 70 km.

Anderson, J. G.↗