LASER INDUCED DISPERSED FLUORESCENCE SPECTRA OF CH3N RADICAL AND THE LIFETIME OF ITS (A)OVER-TILDE(3)E STATE

摘要

The laser induced dispersed fluorescence spectra (LIDFS) of CH,N radical from five different vibronic excited levels were recorded and assigned. The anharmonic constants of the v(3)(n) (C-N stretching) mode were determined to be omega(0) = 1049 +/- 2 cm(-1), omega(0) chi(0) = 9 +/- 0.5 cm(-1). The previous tentative assignment of Ib band in the excitation spectrum [J. Chem. Phys. 103 (1995) 4418] was confirmed by LIDFS. The lifetimes of different vibrational levels of the (A) over tilde(3)E State were measured and the radiative lifetimes of v' = 0, v'(3) = 1, v'(2) = 1, v'(3) = 2, v'(3) = 3 and v'(1) = 1 states were extrapolated as 415 +/- 8, 341 +/- 10, 231 +/- 18, 219 +/- 9, 170 +/- 3 and 166 +/- 7 ns, respectively. [References: 17]