15min:
INVESTIGATION OF THE COLLISION-INDUCED-ABSORPTION CONTRIBUTION TO THE 1.27µm a1Deltag - X3Sigmag- BAND OF O2.

C. L. LUGEZ, W. J. LAFFERTY AND G. T. FRASER, OPTICAL TECHNOLOGY DIVISION, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, GAITHERSBURG, MD 20899.

The collision-induced absorption structure accompanying the magnetic-dipole-allowed 1.27 µm a1Deltag - X3Sigmag- band of O2, originally observed in the laboratory by Badger, Wright, and Whitlock, has been measured at 0.03 cm-1 resolution using a Fourier-transform infrared spectrometer. Spectra were recorded at an optical pathlength of 84 m for pure O2, at temperatures between 253 K to 293 K and pressures to 9 atm. Several spectra were also measured for room-temperature O2/N2 mixtures. These results presently being analyzed will allow comparison with recent measurements of these bands in the atmosphere by Mlawer, Clough, Brown, Stephen, Landry, Goldman, and Murcray.