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We have recorded high-resolution absorption spectra of12CH4cooled in a jet, using a Fourier transform interferometer. The expected nuclear spin symmetry conservation in the jet is exhibited from data recorded around 3000 cm−1showing the relative intensity of the lines starting from theJ″ = 2paraandortholevels. Spectra recorded around 4300 cm−1are used to validate existing rovibrational parameters...
The observation of Comet Shoemaker-Levy 9's collision with Jupiter in July of 1994 by the United Kingdom Infrared Telescope (UKIRT) produced spectroscopic data of high quality. Analysis of the data for Impact C has produced the first temperature curve that covers such an event, from the first visibility of the plume above the limb through to the settling down of the ejected gas onto the upper jovian...
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