Abstract

We report high-resolution inverse Raman spectroscopy measurements of nitrogen Q-branch linewidths in pure nitrogen at temperatures up to 1500 K and at pressures from 20 to 760 Torr. Transitions from J = 0 to J = 30 have been measured with a resolution of 1.5 × 10⁻³ cm⁻¹ and a Raman shift accuracy of 1 × 10⁻³ cm⁻¹. Fits to the data using a Galatry line-shape model provide J-dependent collisional-broadening coefficients. A modified exponential-gap scaling law accurately describes the dependence of these coefficients on temperature and rotational quantum number.

© 1986 Optical Society of America

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