High-resolution doppler-free two-photon spectroscopic studies of molecules. II. Theν2bands ofNH314

Detailed studies involving high-resolution Doppler-free two-photon spectroscopic measurements of the ${\nu }_2$ vibrational bands in ${}_{}{}^{14}{}_{}{}^{}\mathrm{NH}_3^{}{}_{}{}^{}$ 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 $Q(5,4)\mathrm{}$ vibrational-rotational transitions to study the spectroscopic and collisional properties of the ${\nu }_2$ vibrational manifold. We report (1) precise transition energies for the $({\nu }_2,J,K)=(0^{-},5,4)\to (2^{-},5,4)$ 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 ${}_{}{}^{14}{}_{}{}^{}\mathrm{NH}_3^{}{}_{}{}^{}$-Ne collisions is also reported.