Abstract
A laser-microwave double-resonance experiment has been developped basing on the principle of the known laser-rf double-resonance technique. This novel beam experiment allows high-resolution measurements of rotational transitions in a molecular ground state. The method was applied to the high-temperature radical CaCl to study the hyperfine structure of transitions between low-lying rotational states. Microwave scans yielded linewidths of 15–20 kHz limited only by time-of-flight broadening and residual Zeeman splitting.
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Ernst, W.E., Kindt, S. A molecular beam laser-microwave double-resonance spectrometer for precise measurements of high temperature molecules. Appl. Phys. B 31, 79–83 (1983). https://doi.org/10.1007/BF00702602
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DOI: https://doi.org/10.1007/BF00702602