High-Resolution Coherent Raman Spectra of Vibrationally Excited14N2and15N2

摘要: Abstract At an effective resolution of 0.001 cm −1 , we measured coherent anti-Stokes Raman spectra electrically discharged 14 N 2 and 15 in the electronic ground state X 1 Σ g + specifically Q branches bands with Δ v = up to ′ 8 for 7 O S fundamental band . Account is taken small wavenumber shifts due pressure, AC Stark, |χ| interference effects. Separate fits -branch data each isotopic variant, combined selected from literature, yield term coefficients Y kl U or potential-energy c j that reproduce wavenumbers spectral lines generally within 0.004 The value harmonic vibrational parameter ω e 2358.5402(4) 2278.7913(7) Efforts combine both variants distinguish adiabatic nonadiabatic effects arising incomplete separation nuclear motion were unsuccessful.