Skip to main content

Application of Computer-Simulated Infrared Solar Spectra to the Detection of Atmospheric Fluorocarbon-12

Buy Article:

$29.00 plus tax (Refund Policy)


Fluorocarbon-12 (CCl2F2) has been detected in the atmosphere by observation of infrared solar spectra in two spectral regions of the 8 to 12 μm atmospheric transmission window. The solar spectra were compared with laboratory spectra of CCl2F2 and also with computer synthesized spectra which were generated from the most recent Air Force Cambridge Research Laboratories line parameters listing. Water vapor lines interfere with strong Q-branch absorption features of CCl2F2 in the spectral region near 923 cm−1. The region near 1161 cm−1 is free from water vapor absorption and has the strongest Q-branch feature of CCl2F2. Many laboratory spectra of CCl2F2 were studied and this absorption feature was found to be independent of N2 broadening pressure. No change in the half-width was found as the N2 pressure was varied from 0 to 700 Torr. Furthermore, assuming a Lorentz line shape for this CCl2F2 absorption feature, an intensity of 3.8 × 10−18 cm. molecule−1 and a half-width of 0.026 cm−1 were found. Using these parameters, synthetic solar spectra were computed which included the CCl2F2 absorption feature. Results of this computer generation of solar spectra indicate a ground level concentration of 110 parts per trillion of CCl2F2 in our solar spectra.

Keywords: Atmospheric pollution detection; Computer generated spectra; Fluorocarbon-12; Infrared solar spectra

Document Type: Research Article


Affiliations: 1: Department of Physics, Ohio State University, Columbus, Ohio 43210; present address: Electro-Science Laboratory. The Ohio State University, Columbus, OH 43210 2: Department of Physics, Ohio State University, Columbus, Ohio 43210 3: Department of Chemistry, Ohio State University, Columbus, Ohio 43210

Publication date: May 1, 1977

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more
Real Time Web Analytics