# ROTATIONAL ENERGY LEVELS AND PRESSURE BROADENING OF $^{12}CH_{3}F$ IN ITS GROUND AND v3 EXCITED VIBRATIONAL STATES

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 Title: ROTATIONAL ENERGY LEVELS AND PRESSURE BROADENING OF $^{12}CH_{3}F$ IN ITS GROUND AND v3 EXCITED VIBRATIONAL STATES Creators: Crownover, R. L.; Skatrud, David D.; De Lucia, Frank C. Issue Date: 1985 Publisher: Ohio State University Abstract: The rotational spectrum of $^{12}CH_{3}F$ in its ground and $\nu_{3}$ excited vibrational states has been investigated in the millimeter and submillimeter spectral region. In addition, pressure broadening has been studied for a number of transitions in both states. The $J=12-11, K=2, \nu_{3}$ transition that is the basis of the well known FIR laser has been observed both in absorption and emission. The absorption measurement and the results of the spectroscopic analysis of the $\nu_{3}$ state give the frequency of this laser transition to very high accuracy. This represents the frequency of this laser unbiased by either pump offset or cavity pulling effects. Description: Author Institution: Department of Physics, Duke University; Department of Physics, Duke University; Department of Physics, Duke University URI: http://hdl.handle.net/1811/12308 Other Identifiers: 1985-WG-9