The nitric oxide fundamental band : frequency and shape parameters for rovibrational lines

摘要: Abstract Solar McMath FTS spectra, recorded with a full instrumental width of about 0.0064 cm−1, were obtained the fundamental vibration-rotation band (υ = 1 ← 0) 14N16O. These spectra have been used to determine N2-induced-broadening and N2-induced-shift coefficients as well line intensities positions. Measurements made from 1780 1952 up |m| ≍ 22.5, for P R branches 2Π1/2 2Π3/2 subbands few transitions Q branch. The rotationless transition moments two sub-bands found be within 2 % each other. first-order Herman-Wallis intensity factor, C, measured first time, is in excellent agreement theoretical predictions. 114.9 ± 3.4 cm−2 atm−1 at 296 K. v 0 N2-broadened widths N2-induced pressure shifts are, respectively, 3% different factor smaller than those by Pine et al. [J. Mol. Spectrosc.114, 132-147 ( 1985 ) ] band. broadening where comparisons can made, twenty percent four larger results reported Ballard Spectrosc.127, 70-82 (1988)]. Line positions are retrieved calibrated an accuracy ±5 × 10−5 cm−1 using 1-0 CO. Comparisons calculated based on constants Hinz Spectrosc.119, 120-125 1986)] reveal very good subband systematic divergence effects hyperfine splittings also detected low m transitions.