Intensity and transmission measurements in the ν3-fundamental of N2O at low temperatures

Spectral transmission of i.r. radiation through the nitrogen-broadened lines of the υ₃-fundamental of N₂O has been measured at 154°, 202° and 300°K. A value of S⁰_v = 1411±54 cm^-2atm^-1 at S.T.P. has been obtained for the combined strength of the ν₃ and ν₂¹+ν₃?ν₂¹ bands using the Wilson-Wells-Penner-Weber method. This value for S_v, the relative intensity calculations of Gray Young, the room-temperature data of Toth for nitrogen-broadened half-widths in the ν₁+ν₃ and 2ν₂⁰+ν₃ bands and the T^-0.75 variation of line width with temperature proposed by Varanasi and Sarangi are shown to yield excellent agreement between the measured and computed spectral transmittance throughout the band.