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THEORETICAL DETERMINATION OF $N_{2}$-BROADERED HALFWIDTHS OF OZONE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/11823

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Title: THEORETICAL DETERMINATION OF $N_{2}$-BROADERED HALFWIDTHS OF OZONE
Creators: Gamache, Robert R.; Davies, R. W.; Rothman, Laurence S.
Issue Date: 1983
Abstract: For $^{16}O_{3}$, accurate $H_{2}$-broadened halfwidths are difficult to obtain for a large number of transitions. Recent $measurements^{1}$ have allowed assigning average air-broadened halfwidths of ozone for A-type bands, $\alpha$ = $0.083 cm^{-1}$/atm, and for B-type bands, $\alpha$ = $0.077 cm^{-1}$/atm at 296K. These measurements, however, were not extensive enough to give J-dependence of the halfwidths. Theoretical $N_{2}$-broadened halfwidths have been determined for a number of $\nu _{3}$ (A-type) and $\nu_{L}$ (B-type) transitions of ozone. The halfwidths have been evaluated using the Anderson-Tsao-Ournutte theory of collisional-broadening and by the more rigorous Quantum Fourier Transform theory due to $Davies.^{2}$ In the calculations, contributions to the halfwidth from dipole-quadrupole interaction and quadrupole-quadrupole interaction are considered. Both methods are compared with experiment. From the study, air-broadened halfwidths will be calculated for an extensive list of transitions for ozone, and these will appear on a future AFGL Main Gas Compilation. 1. J. M. Hoell, C. N. Harward, C. H. Bair, and B. S. Williams, opt. Eng. 21, 548(1982); J. S. Margolis, Appl. Opt. 21, 3109 (1982). 2. R. W. Davies, Phys. Rev. A12, 927 (1975). This work was supported by the Air Force Office of Scientific Research, through AFGL task 2310G1.
URI: http://hdl.handle.net/1811/11823
Other Identifiers: 1983-ME-13
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