Study of nascent Na H in sodium-hydrogen mixture using resonant CARS and FWM processes

The Coherent anti-Stokes Raman Spectroscopy (CARS) technique was applied to measure the O,Q, and S branches from the first, second and third overtones of the X1Σ+ ground state of Na H. Moreover, P and R doublets were also measured when the anti-Stokes signal was resonant with some lines of the electronic transitions A1Σ+- X1Σ= of Na H. The high sensitivity resulting from pump laser resonances allowed us to study the Na(nl)+H2 → Na H+H reaction dynamics. (author)