Accurate spectroscopic constants of nitrogen determined from stimulated Raman spectra of the fundamental and first hot bands

Nitrogen spectra of the Q‐branch of the fundamental and the first hot bands were recorde with a high‐resolution stimulated Raman spectrometer at atmospheric pressure and ca. 1300 K. The absolute frequencies of the Raman lines were measured with high accuracy, leading to a refinement of spectroscopic constants. A temperature estimation was also performed from the Raman intensities.