Two independently tunable VUV laser sources are combined with a time-sliced velocity-map ion imaging, VMII, detection system to study the state-selected photodissociation dynamics of N2 and CO. Resonant nonlinear four-wave sum-frequency (2?1 + ?2) mixing, RFWM, using a rare gas jet as the nonlinear medium is used to produce the tunable VUV laser sources. The ?1 and ?2 are the UV and visible laser frequencies, respectively. This RFWM method produces enough intensity so that unfocused laser light may be used with VMII detection to determine the product branching ratio and recoil anisotropy parameters as a function of the ro-vibronic level of parent molecules. Three dissociation channels of N2, namely, the N(4S) + N(2D),  N(4S) + N(2P) and N(2D) + N(2D) are studied in the energy region between 12.50-15.15 eV. For CO in the same energy region, the branching ratio between the spin-allowed C(3PJ) + O(3PJ) and the spin-forbidden C(1D) + O(3PJ) and C(3PJ) + O(1D) channels are measured. The areas in astrochemistry that can be affected by the increased reactivity of the metastable atoms that are produced by these molecules will be discussed.

State specific non-adiabatic branching ratios for N<sub>2</sub> and CO using tunable VUV lasers and time-sliced velocity-map ion imaging for detection

246th National Meeting (2013)

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State specific non-adiabatic branching ratios for N2 and CO using tunable VUV lasers and time-sliced velocity-map ion imaging for detection

State specific non-adiabatic branching ratios for N₂ and CO using tunable VUV lasers and time-sliced velocity-map ion imaging for detection