Ozone line shifts by nitrogen and oxygen pressure are computed for the 1 þ 3 , 2 1 and 2 3 bands of the 5 m spectral region by a semiempirical approach. The calculated values agree with measurements better than 0.001 cm À1 atm À1 for 98% of O 3 -N 2 lines and 87% of O 3 -O 2 lines. In contrast with the water molecule case, the polarization components of the interaction potential are shown to contribute to the line shift more efficiently than the electrostatic interactions. As intermediate results, the mean dipole polarizability and the components of the polarizability tensor for the vibrational states (101), (200), and (002) of ozone molecule are determined by least-squares fitting of theoretical shifts to some experimental values. The temperature exponents for the 1 þ 3 band lines are also estimated.
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