Oxygen absorption in the spectral range 180–300 nm for temperatures to 3000 K and pressures to 50 atm.

Abstract

Calculated oxygen absorption coefficients are given for the spectral range 180–300 nm, at a spectral resolution of 0.05 nm (instrumental function half-width) and with a spectral increment of 0.0125 nm. The results are presented for temperatures between 300 and 3000 K, and for pressures between 1 and 50 atm. The spectra were first calculated at high resolution, preserving the natural shape of the spectral lines, using line-by-line techniques and Voigt line shapes. Absorption processes considered include the Schumann–Runge and Herzberg 1 band and continuum systems, including the pressure-dependent component usually ascribed to the formation of the (O2)2 dimer. The results were degraded before use, which allowed several approximations to be introduced into the computing procedures; these are discussed.

Optical Emission Spectroscopy of Argon–Fluorocarbon–Oxygen Fed Atmospheric Pressure Dielectric Barrier Discharges

“…A deeper analysis of the ArF band (Figure 3) allows to observe the presence of weak absorptions ascribed to the Schumann–Runge system (${\rm B}^3 \Sigma _u^ - - {\rm X}^3 \Sigma _g^ -$ ) of O 2 56–60. These absorptions are due to the O 2 present both in the DBD reactor and in the optical path inside the monochromator (not under vacuum).…”

Commission 14 : Atomic and Molecular Data (Donnees Atomiques et Moleculaires)

“…Considerable effort has been expended to enhance the extensive suite of spectral synthesis codes which they have developed to realistically simulate, on a line-by-line basis, emission and absorption spectra from the EUV to the microwave regions. Recent work includes significant improvement (138) of their earlier simulation of the 0 2 Herzberg system (139). Realistic account has also been taken of particulate scattering contributions to the microwave extinction spectrum of the atmosphere in the 80GHz region and of the molecular and particulate contributions to atmospheric extinction in the region 0-1000GHz (140).…”

Nitric oxide detection inside the cylinder of an SI engine by direct UV absorption spectroscopy

“…Regarding the future anti-pollution and fuel consumption regulations, becoming more and more drastic, many efforts are put into the development of new and [20][21][22], water vapor [22][23][24], and oxygen [25][26][27] make now possible to overcome this interference. However, quantitative spectroscopic measurements of NO become achievable only if the nitric oxide absorption could be distinguishable from the interference of the above-cited three molecules.…”