Depolarised Rayleigh scattering from liquid carbon monoxide, nitrogen and oxygen

✍ Scribed by J. Bruining; J.H.R. Clarke

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 584 KB
• Volume: 31
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(75)85039-1

✦ Synopsis

The spectral distributions and scattering cross sections of depobised Rayleigh scattering have been determined for Liquid carbon monoxide, nitrogen and oxygen at 77 K and atmospheric pressure. It is shown that the s&ttering arises predominantly from molecular orientational fluctuations. The experimental scattering cross sections at 488 nm are 7 f 1 for CO, 16 2 1 for Nz and 46 * 4 for 02 in units of 10m3' cm* sr-' molecule-', based on a recently determined value for the absolute depoIarised scattering intensity for Liquid argon. The estimated proportions of induced anisotropy scattering are 10% for CO, 2.5% for N2 and 0.8% for 02. It is shown that there is appreciable free rotation of N2 and CO in the liquids at this temperature but for 02 this motion is dissipated much more efficiently by molecular interactions.