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Method for observing Doppler-free hot-band transitions

Double resonance spectroscopy in a molecular beam

  • Photophysics, Laser Chemistry
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Abstract

A novel spectroscopic method for highly sensitive detection of hot-band transitions based on infrared-infrared double resonance in a molecular beam was successfully demonstrated. The intensity of the infrared transitions from a vibrationally excited state is enhanced by two orders of magnitude by resonant laser pumping. The hot-band transitions are identified in connection with the assigned transitions in the fundamental band. Doppler-free spectral lines are observed. The experiment was carried out on the 2v 3v 3 transitions of CH3F with CO2 laser pumping and probing.

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Matsushima, F., Morita, N., Honguh, Y. et al. Method for observing Doppler-free hot-band transitions. Appl. Phys. 24, 219–224 (1981). https://doi.org/10.1007/BF00899760

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  • DOI: https://doi.org/10.1007/BF00899760

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