The inelastic case Dynamical mapping

The photodissociation of H20(A) represents a very special example of rotational excitation the initial FC distribution, which reflects solely the bending motion in the parent molecule, remains unchanged because the torque —dV/dj is essentially zero along the reaction path. In most other cases, however, the coupling between translation and rotation is substantial and the final state distribution of the fragment reflects the net result of this coupling. 

In this section we focus our attention on two particular examples, the photodissociation of H2O2 and the photodissociation of H2O via the BlA state. In the first case, the extent of rotational excitation is moderate, i.e., only a few percent of the total available energy flow into rotation. The dissociation of H20(S), on the other hand, represents an example of extremely strong rotational excitation. 

The photodissociation of H2O2 is a generic example of modest rotational excitation. The maximum of the distribution corresponds to only 

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The ultimate desirable outcome in any chemical reaction dynamic experiment is the measurement of flux-velocity contour maps for quantum-state-selected products from photofragmentation, or inelastic and reactive collisions processes for which the initial state is also well defined. From such contour maps, complete information on the chemical process can be deduced in favourable cases. 

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