Lead-salt-diode lasers have been used to detect more than 100 absorption lines of H3O+ in an ac discharge by using the velocity-modulation technique. Many lines have been assigned to vibration–rotation transitions in the 1− ← 0+ and 1+ ← 0− components of the ν2 inversion mode of H3O+ with band centers at 954.4 and 525.8 cm−1, respectively. The results for the former band extend those of earlier work and lead to some minor changes in assignment.
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Weights are based on estimated line uncertainties and are used in subsequent data fits.
Calculated positions using constants in Table 3.
Measurement of Haese and Oka (1984)7.
Line measurement not incorporated in fit, since it deviates strongly from calculated position.
Measurement of Lemoine and Destombes (1984)18.
Weights are based on estimated line uncertainties and are used in subsequent data fits.
Calculated positions using constants in Table 3.
Measurement of Haese and Oka (1984)7.
Line measurement not incorporated in fit, since it deviates strongly from calculated position.
Measurement of Lemoine and Destombes (1984)18.