High-resolution doppler-free two-photon spectroscopic studies of molecules. II. The ν2 bands of 14NH3

Physics – General Physics

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Scientific paper

Detailed studies involving high-resolution Doppler-free two-photon spectroscopic measurements of the ν2 vibrational bands in 14NH3 are presented. Using the technique of combining fixed-frequency ir sources with molecular Stark tuning presented in the preceding paper, we have used two successive Q(5,4) vibrational-rotational transitions to study the spectroscopic and collisional properties of the ν2 vibrational manifold. We report (1) precise transition energies for the (ν2,J,K)=(0-,5,4)-->(2-,5,4) two-photon transition, (2) pressure-broadening and pressure-shift data, (3) optical Stark shift parameters, and (4) excited-state transition matrix elements. An observation of collisional narrowing arising from 14NH3-Ne collisions is also reported.

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