β Scribed by G.N. Schading; P. Roth
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The thermal decomposition of HC1 behind shock waves was studied by time-dependent concentration measurements of both the decomposition product H, as well as the initial reactant HCI. The experiments were performed in mixtures containing 1.4 to 3800 ppm HCI diluted in argon in the temperature range 2500 K _< T _< 4600 K. In the first series of experiments H atoms were measured by applying the ARAS technique (Atomic Resonance Absorption Spectroscopy). In the second series of experiments an infrared diode laser was rapidly tuned to the (0-1) P7 vibrational-rotational line of HCI and the resulting absorption profiles were evaluated in terms of concentrations of the initial reactant. From both the concentration profiles of H and HC1, a rate coefficient of the reaction HCI+Ar ~-H+CI+Ar, k 1 = 9.0* 1013exp tools" was determined. Based on a proposed reaction mechanism, rate coefficients of secondary reactions of H and HCI with the initial reactant were estimated.
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## Abstract The thermal decomposition rate of N~2~O~5~ in 760 Torr of air as a function of temperature between 314 and 348 K has been investigated using the technique of pulsed laser cavity ringβdown spectroscopy (CRDS) detection of NO~3~ radicals at 662 nm. The Arrhenius expression of the thermal
Infrared line positions, linestrengths, and pressure-broadening coefficients are required to determine absolute trace gas concentrations from high-resolution absorption spectra. We have measured these values for the infrared absorption lines in the Ξ½ 12 band (antisymmetric wag) of hydrazine between
FIG. 6. Plot of integrated absorption from 965.4774 to 965.6633 cm -1 versus hydrazine column density (number density times path length). The slope is the integrated line strength for this spectral region.