Measurements of absolute absorption cross sections of ozone in the 185-to 254-nm wavelength region and the temperature dependence

1993 ◽  
Vol 98 (D3) ◽  
pp. 5205-5211 ◽  
Author(s):  
K. Yoshino ◽  
J. R. Esmond ◽  
D. E. Freeman ◽  
W. H. Parkinson
Keyword(s):  
Temperature Dependence ◽  
Cross Sections ◽  
Wavelength Region ◽  
Absorption Cross

Absorption Cross Sections of O2(a1Δg) and O2(X3Σg−) in the Region from 1087 to 1700 Å

1975 ◽  
Vol 53 (19) ◽  
pp. 1845-1852 ◽  
Author(s):  
S. Ogawa ◽  
M. Ogawa
Keyword(s):  
Metastable State ◽  
Cross Sections ◽  
Ground State ◽  
Experimental Error ◽  
Wavelength Region ◽  
Absorption Cross ◽  
Band Structures ◽  
The Cross

An attempt has been made to measure the absorption cross sections of O2 in the metastable state a1Δg from 1087 to 1700 Å. The absorption is measurable (σa ≥ 3 × 10−19 cm2) from around 1500 Å towards shorter wavelengths. Many band structures overlaying various continua have been seen. Absorption cross sections of O2 in the ground state X3Σg− also have been measured in the same wavelength region and our results agree with previously published values within experimental error. The cross sections of O2(a1Δg) are generally larger than those of O2(X3Σg−) below 1290 Å except at the wavelengths of a few strong bands of O2(X3Σg−).

scholarly journals The MPI-Mainz UV/VIS Spectral Atlas of Gaseous Molecules of Atmospheric Interest

2013 ◽  
Vol 5 (2) ◽  
pp. 365-373 ◽  
Author(s):  
H. Keller-Rudek ◽  
G. K. Moortgat ◽  
R. Sander ◽  
R. Sörensen
Keyword(s):  
Cross Sections ◽  
Wavelength Region ◽  
Quantum Yields ◽  
The Internet ◽  
Web Pages ◽  
Data Sets ◽  
Absorption Cross ◽  
Large Collection ◽  
Data Files ◽  
The Web

Abstract. We present the MPI-Mainz UV/VIS Spectral Atlas of Gaseous Molecules, which is a large collection of absorption cross sections and quantum yields in the ultraviolet and visible (UV/VIS) wavelength region for gaseous molecules and radicals primarily of atmospheric interest. The data files contain results of individual measurements, covering research of almost a whole century. To compare and visualize the data sets, multicoloured graphical representations have been created. The MPI-Mainz UV/VIS Spectral Atlas is available on the Internet at http://www.uv-vis-spectral-atlas-mainz.org. It now appears with improved browse and search options, based on new database software. In addition to the Web pages, which are continuously updated, a frozen version of the data is available under the doi:10.5281/zenodo.6951.

scholarly journals Temperature dependence on VUV-absorption cross sections of CO2 molecule in the energy region of 10.6 – 11.8 eV

2015 ◽  
Vol 635 (11) ◽  
pp. 112055
Author(s):  
M Hoshino ◽  
M Matsui ◽  
Y Mochizuki ◽  
T Odagiri ◽  
A Kondo ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Cross Sections ◽  
Energy Region ◽  
Absorption Cross

scholarly journals Relative O(1D) Quantum Yields in the near UV Photolysis of Ozone at 298 K

1975 ◽  
Vol 30 (6-7) ◽  
pp. 835-844 ◽  
Author(s):  
G. K. Moortgat ◽  
P. Warneck
Keyword(s):  
Quantum Yield ◽  
Temperature Dependence ◽  
Cross Sections ◽  
Spectral Band ◽  
Monochromatic Light ◽  
Wavelength Region ◽  
Band Width ◽  
Quantum Yields ◽  
Dissociation Limit ◽  
Ozone Absorption

Abstract Mixtures of O3 with excess N2O were photolysed in the wavelength region 290 - 335 nm using monochromatic light with a band width of 4 nm. The resulting primary product atomic singlet oxygen, O(1D), in reacting with N2O produces in part NO which subsequently reacts with O3 giving rise to a weak infrared chemiluminescence. The emission was monitored with a cooled photomultiplier. The emission intensity is directly proportional to the rate of O(1D) production and it has been utilised to derive the relative O(1D) quantum yield as a function of wavelength between 295 and 320 nm. The data were normalised to a quantum yield of unity of 300 nm and corrections were applied to reduce the error resulting from the spectral band width of photolysing radiation. The O(1D) quantum yields show a temperature dependence. At 298 K the quantum yield is unity up to 305 nm, then declines to zero at 319 nm. At the dissociation limit, taken to occur at γ = 310.3 nm, the quantum yields is 0.57, i. e. considerably below unity. The implications of this result as well as the tail toward longer wavelengths and the temperature dependence are discussed. Ozone absorption cross sections are also reported.

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