High-accuracy absorption spectroscopy of CH3OH in the far infrared is discussed. In addition to 22 transitions in the ground state, the frequency of the (n, τ, J, K), (0, 1, 16, 8)→(0, 2, 15, 7) transition in the ν5 excited vibrational level, which is responsible for the laser emission at 119 μm, was measured. The measured frequency is 2,522,782.57(10) MHz at zero pressure, with a pressure shift of 6.1(32) kHz/Pa (0.805(420) MHz/torr). An accurate remeasurement of the laser emission frequency has also been performed, and the results are in good agreement
Accurate frequency of the 119 mu m methanol laser from tunable far-infrared absorption spectroscopy / M. Inguscio;L.R. Zink;K.M. Evenson;D.A. Jennings. - In: IEEE JOURNAL OF QUANTUM ELECTRONICS. - ISSN 0018-9197. - STAMPA. - 26:(1990), pp. 575-579. [10.1109/3.52135]
Accurate frequency of the 119 mu m methanol laser from tunable far-infrared absorption spectroscopy
INGUSCIO, MASSIMO;
1990
Abstract
High-accuracy absorption spectroscopy of CH3OH in the far infrared is discussed. In addition to 22 transitions in the ground state, the frequency of the (n, τ, J, K), (0, 1, 16, 8)→(0, 2, 15, 7) transition in the ν5 excited vibrational level, which is responsible for the laser emission at 119 μm, was measured. The measured frequency is 2,522,782.57(10) MHz at zero pressure, with a pressure shift of 6.1(32) kHz/Pa (0.805(420) MHz/torr). An accurate remeasurement of the laser emission frequency has also been performed, and the results are in good agreement
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