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The study stated that the b(super ~) (super 1) B(sub 1) - a(super ~)(super 1)A(sub 1) spectrum of methylene between 9317 and 9610 cm(super -1) were recorded using frequency-modulated diode laser absorption spectroscopy. A comparison of the results of the recent high-level quantum chemical calculations suggested that the further refinement of the potential energy surface of the b(super ~) state near its equilibrium would be done.

The origin of the cation ground electronic state was used to record the photoinduced Rydberg ionization spectrum of third excited electronic state of phenylacetylene cation. It was found that the vibrational structure of C state of phenylacetylene cation is well resolved, although the line widths are not quite as narrow as other substituted benzenes.

New spectra of methylene, CH2, in the near-infrared are obtained following 308 nm photolysis of ketene, CH2CO. Nascent photofragment Doppler spectra and thermalization kinetics vary systematically with the energy of the absorbing level, providing additional information to support or refute spectroscopic assignments made on the basis of the frequency measurements and combination differences.

The photodissociation experiments on CHBr3 at 248 nm were performed using VUV ionization photofragment translational spectroscopy. It is concluded that the most important photodissociation channel of CHBr3 in the UV region is C-Br bond breaking.

The kinetics and product distribution for the reaction of methyl radicals, CH3, with ground-state O(3P) oxygen atoms were studied. This reaction was investigated with an apparatus which combined a tubular flow reactor and a time-of-flight mass spectrometer, using a hollow-cathode lamp for photoionization. In addition to the dominant product, formaldehyde (CH2O), carbon monoxide was detected as a product with a yield of 0.17 +/- 0.11.