New investigation of nitrogen laser induced fluorescence in formaldehyde: spectra and spectrally resolved lifetimes
Chatham, Ralph Ernest
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Measurements were made of the fluorescence resulting from N_ laser excitation of H^CO vapor at pressures between one and 760 torr. Higher pressure spectral measurements show vibrationally relaxed emission, bands originating in the A and levels. These data supplement Brand's (1956) spectra studies and extend the identification of these band systems beyond 5000a. lOA bandwidth spectra data taken at pressures below 100 torr revealed over 25 new bands which appear to originate 2 1 11 from either the A 6 or 4 6 levels. Tbe variation of band intensity with pressure indicates a strong collision-dependent coupling between these levels.
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