# DIFFERENCE FREQUENCY SPECTROSCOPY OF THE FUNDAMENTAL BAND OF $CH (X^{2}\Pi)$

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 Title: DIFFERENCE FREQUENCY SPECTROSCOPY OF THE FUNDAMENTAL BAND OF $CH (X^{2}\Pi)$ Creators: Lubic, K. G.; Amano, T. Issue Date: 1984 Publisher: Ohio State University Abstract: Fifty-four transitions of the fundamental band of CH have been measured using an IR tunable difference frequency system. CH was generated in a dc discharge through 1 torr He and a few millitorr of $CH_{4}$. Zeeman modulation was used to observe low J transitions, while amplitude discharge modulation was necessary at higher J. A combined fit of these data, microwave-optical double resonance and microwave data yielded values for the band origin, the spin-orbit constant, rotational constants, spin-rotation constants, and lambda-doubling constants for both $v = 0$ and $v = 1$ as well as magnetic hyperfine constants for $v = 0$. Description: Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada URI: http://hdl.handle.net/1811/16689 Other Identifiers: 1984-RB-1