The collision-induced absorption of oxygen in the 540–650-nm wavelength region has been measured at a pressure range from 0 to 730 Torr at T = 294 K. Pressure-dependent cross sections of the X3?g+ +X3?g+ ? a1?g(v = 0) + a1?g(v = 1) and X3?g+ + X3?g+ ? a1?g(v = 0) + a1?g(v = 0) transitions have been determined by means of cavity-ringdown spectroscopy. Contributions of the overlapping ? and ? bands of O2 have been evaded, and Rayleigh extinction has been taken into account.
© 1999 Optical Society of America
Hans Naus and Wim Ubachs, "Visible Absorption Bands of the (O2)2 Collision Complex at Pressures Below 760 Torr," Appl. Opt. 38, 3423-3428 (1999)