Photofragment and Coincidence Experiments

When a molecule in a well specified initial state (e , v , J , M J, velocity/ ) absorbs a photon and then falls apart 

An experimental setup identical to that for PHOFEX spectra can be used to measure correlations between two scalar (internal state population, kinetic energy) quantities or between a scalar and a vector quantity (angular distribution of fragment rotation J or velocity v). By holding the PROBE laser frequency fixed and scanning the MONITOR laser through the Doppler pro- 

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