A method of studying vibrational relaxation of gaseous free radicals has been developed using the time-resolved LMR technique. The LMR signal saturation kinetics is measured under a fast adjustment to the maximum of the first derivative of the absorption line with the help of a fast magnetic field jump (80 G, 10 μs). The vibrational relaxation rate constants (V-V plus V-T) have been measured for ND2(0,1,0) on ND3, CF4 and Ar: (2.7 ± 1)×10-11, (1.9 ± 0.4)×10-11 and (2.4 ± 0.7)×10-14 cm3/s, respectively, (± 2σ). The matrix element of the vibrational transition moment for ND2 ν2 vibration is estimated to be 0.056 ± 0.02 D.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry