Single vibronic level fluorescence emission spectroscopy and radiative lifetimes of H2CO(?1A2):4 and 41
- 15 July 1978
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 69 (2) , 751-757
- https://doi.org/10.1063/1.436586
Abstract
Intensity distributions of the fluorescence emission bands from the two lowest vibrational levels of H2CO(?1A2) have been determined in the wavelength range of 360–460 nm. All of the emission bands observed are well characterized by the Δν2 progressions built on Δν4= odd, and the intensity distribution maxima of the 20m40n and 20m41n progressions occur at m =1, n=1 and m=1, n=2, respectively. From the thermalized intensity distribution data extrapolated to the high pressure limit of n-C4H10 as a buffer gas, the ratio of the radiative lifetimes for the two single vibronic levels, 41 and 40, has been obtained as 0.68±0.12, which agrees well with the theoretical values calculated by either Barnhart and Strickler or Miller and Lee.Keywords
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