Temperature Dependence (256–296K) of the Absorption Cross-Sections of Bromoform in the Wavelength Range 285–360 nm

1993 ◽  
pp. 359-369 ◽  
Author(s):  
Geert K. Moortgat ◽  
Richard Meller ◽  
Wolfgang Schneider
Keyword(s):  
Temperature Dependence ◽  
Wavelength Range ◽  
Cross Sections ◽  
Absorption Cross

scholarly journals Scattering and Absorption Cross-sections of Atmospheric Gases in the Ultraviolet-Visible Wavelength Range (307–725 nm)

2020 ◽  
Author(s):  
Quanfu He ◽  
Zheng Fang ◽  
Ofir Shoshamin ◽  
Steven S. Brown ◽  
Yinon Rudich
Keyword(s):  
Refractive Index ◽  
Wavelength Range ◽  
Cross Sections ◽  
Rayleigh Scattering ◽  
Dispersion Relations ◽  
Optical Absorption Spectroscopy ◽  
Absorption Cross ◽  
Atmospheric Gases ◽  
Scattering Cross ◽  
Scattering Cross Sections

Abstract. Accurate Rayleigh scattering and absorption cross-sections of atmospheric gases are essential for understanding the propagation of electromagnetic radiation in planetary atmospheres. Accurate extinction cross-sections are also essential for calibrating high finesse optical cavities and differential optical absorption spectroscopy and for accurate remote sensing. In this study, we measured the scattering and absorption cross-sections of carbon dioxide, nitrous oxide, sulfur hexafluoride, oxygen, and methane in the continuous wavelength range of 307–725 nm using Broadband Cavity Enhanced Spectroscopy (BBCES). The experimentally derived Rayleigh scattering cross-sections for CO2, N2O, SF6, O2, and CH4 agree with refractive index-based calculations, with a difference of 1.5 % and 1.1 %, 1.5 %, 2.9 %, and 1.4 % on average, respectively. The O2-O2 collision-induced absorption and absorption by methane are obtained with high precision at the 0.8 nm resolution of our BBCES instrument in the 307–725 nm wavelength range. New dispersion relations for N2O, SF6, and CH4 were derived using data in the UV-vis wavelength range. This study provides improved refractive index dispersion relations, n-based Rayleigh scattering cross-sections, and absorption cross-sections for these gases.

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

Experimental Determination of SO2, C2H2, and O2 UV Absorption Cross Sections at Elevated Temperatures and Pressures

1997 ◽  
Vol 51 (9) ◽  
pp. 1311-1315 ◽  
Author(s):  
J. Vattulainen ◽  
L. Wallenius ◽  
J. Stenberg ◽  
R. Hernberg ◽  
V. Linna
Keyword(s):  
Absorption Spectra ◽  
Wavelength Range ◽  
Cross Sections ◽  
Elevated Temperatures ◽  
Uv Absorption ◽  
Reference Spectrum ◽  
Absorption Cross ◽  
Deuterium Lamp ◽  
Made In

A heated and pressurized quartz cell with 150.5-mm pathlength was used to experimentally determine UV absorption spectra and further absorption cross sections of SO2, C2H2, and O2 in the wavelength range between 200 and 400 nm. Spectra were recorded at room temperature, and at 600 and 800 °C and at absolute pressures between 1 and 6 bar. A 30-W deuterium lamp was used as a light source, and the light was detected with a photomultiplier tube through a 0.4-m Czerny–Turner monochromator. Slit widths of the monochromator were adjusted to achieve a 5 Å measurement bandwidth, and the scan through the wavelength range was made in 5 Å steps. For each individual temperature and pressure level, a reference spectrum was first recorded with the cell filled with nitrogen. After this, the cell was filled with the selected species mixed with nitrogen, and the absorption spectra were recorded in similar conditions. The studied gas mixtures were calibrated to 3% accuracy.

Temperature dependence of the HNO3UV absorption cross sections

1993 ◽  
Vol 98 (D12) ◽  
pp. 22937 ◽  
Author(s):  
James B. Burkholder ◽  
Ranajit K. Talukdar ◽  
A. R. Ravishankara ◽  
Susan Solomon
Keyword(s):  
Temperature Dependence ◽  
Cross Sections ◽  
Absorption Cross
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