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Методом термодинамического моделирования теоретически изучена возможность определения серы по спектру молекулярного поглощения CS в пламенах ацетилен-воздух и ацетилен-динитрооксид. Показано, что наиболее чувствительное определение серы возможно только с использованием сильно обогащенных по топливу пламен. Рассмотрен возможный механизм образования молекул CS в пламенах. Согласно расчетам прогнозируется отсутствие матричных неспектральных помех многих катионов и анионов на аналитический сигнал серы. Выявлены также оптимальные составы пламен для определения серы по ее атомному поглощению. Теоретические расчеты хорошо подтверждают экспериментальные данные., Sulfur determination possibilities by CS molecular absorption in air-acetylene and nitrous oxide-acetylene flames were investigated. It was found that most sensitive sulfur determination is possible only highly fuel-enriched flames. Possible mechanism of CS molecular formation in flames was investigated. According to calculation, chemical interferences of most cations and anions on sulfur analytical signal were not found. Optimum flames compositions for sulfur determination by atomic absorption was revealed. Theoretical calculations are in a good agreement with experimental data.

The structure of the Sgr B2 molecular cloud has been studied by detailed and extensive mappings of the CO, (13C)O, CS and H2CO (20cm) transitions. The cloud consists of a dense core at the OH maser position plus a very large (r = 45 pc) envelope. The total mass of the cloud is estimated independently from calculated (13C)O column densities, from application of the virial theorem, and from far infrared measurements. The molecular gas has an average temperature of about 20K; that this is similar to the temperature of grains emitting far infrared radiation is taken as evidence of near thermal equilibrium between dust grains and H2. The dynamics of the gas in the cloud are found to be dominated by large scale systematic motions with velocity not a monotonic function of radius.

The available data on the microwave spectra of carbon monoxide, carbon monosulfide, and silicon monoxide are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion parameters, dipole moments, hyperfine coupling constants, and structure are tabulated. Observed rotational transitions are presented for all measured isotopic forms of these molecules. All of the available data has been analyzed in order to predict all rotational transitions of these molecules up to 300 GHz. Error limits have been taken from the original literature for each measured transition frequency. All predicted transition frequencies are given with estimated uncertainties which represent the 90 percent confidence limit. (Author), Reprint no. 47 from Jnl. of Physical and Chemical Reference Data, v3 n1 p245-257 1974. See also AD-D095 075.

The subject contract was divided into two major efforts: (1) an investigation of CS-fueled CO chemical lasers, and (2) experimental measurements of CO vibrational relaxation by means of probe laser transient gain experiments. (Modified author abstract)

Strong infrared chemiluminescence, largely attributable to OCS, was observed in the reactions of O atoms with CS2 in a fast flow system. Vibrationally excited CO was detected only weakly and at low CS2-O2 ratios. (Author)