Single- and multi-photon absorption of carbon dioxide laser lines by SO2 and CO2 molecules |
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Authors: | F Al-Adel S M A Durrani |
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Institution: | (1) Laser Research Section, The Research Institute, King Fahd University of Petroleum and Minerals, Box 732, 31261 Dhahran, Saudi Arabia |
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Abstract: | Summary We have used 60 rovibrational lines of a Lumonics TEA CO2 laser to record the spectra of coincidence of SO2 IR absorption with CO2 laser emission. We extended the same type of investigation to CO2 molecules and observed an absorption at practically all the rovibrational lines of the laser. We have also recorded the increase
of absorption with pressure of the studied molecule and with its temperature. Our work reveals very accurately the fine structure
of these absorptions that shows a clear discreteness in the intensities of the lines. Some implication of this discreteness
in multiphoton absorption is also presented, through data that indicate very strong vibrational coupling between ground and
excited electronic states of SO2.
The authors of this paper have agreed to not receive the proofs for correction. |
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Keywords: | Infrared spectra |
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