Visible absorption bands of the (O_2)_2 collision complex at pressures below 760 Torr

Visible absorption bands of the (O2)2 collision complex at pressures below 760 Torr.

The collision-induced absorption of oxygen in the 540-650-nm wavelength region has been measured ata pressure range from 0 to 730 Torr at T 5 294 K. Pressure-dependent cross sections of the X 3Sigmag(+)+X 3Sigmag alpha 1Deltag(nu =0) + alpha 1Deltag(nu = 1 ) and X 3Simag(+)+ X 3Sigmag+--> alpha 1Deltag(nu =0) + 1 alpha 1Deltag (nu = 0) transitions have been determined by means of cavity-ringdow...

Structure in the visible absorption bands of jet-cooled phenylperoxy radicals.

The visible absorption bands of the phenylperoxy radical in the gas phase have been investigated using cavity ring-down spectroscopy. Jet-cooling was used to reduce the spectral congestion. Structured spectra spanning the range from 17,500 to 19,000 cm(-1) are reported for the first time. Analyses of these data have been guided by the results from time-dependent density functional calculations....

Wildfire Smoke Analysis Using the 760 Nm Oxygen Absorption Feature

In October 2003 the Santa Susanna Mountains, located to the northwest of Los Angeles, CA, sustained severe wild fires. The Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) acquired four meter spatial resolution data over the burning area to assess the impact of the fires on the wildland to urban interface. Additional goals of the flights were testing the capabilities of airborne hype...

Infrared absorption of solid nitrogen at high pressures.

We have observed infrared absorption peaks in solid nitrogen at hydrostatic pressures as high as 7 GPa at liquid-helium temperatures. The shift in the AlSb:CSb local vibrational mode is used to precisely calibrate the pressure. For all measured pressures we also observe the n3 vibrational mode of CO2 impurities. For pressures greater than 1.9 GPa, a peak appears which we attribute to a N-N stre...

Chapter 2 A Femtosecond Visible / Visible and Visible / Mid - Infrared Transient Absorption Study of the Light Harvesting Complex