Photodissociation probability amplitude

The photodissociation probability into the state characterized by n at energy E, Pn(E i), is given by the square of Aa(E i), the photodissociation amplitude for observing the free state exp(—iEt/1i) E, n 0) in the long-time limit. That is,... 

Suppressing for the moment all channel indices m (which can be readily included), save for the final direction k, we square the amplitude to obtain Pq(E, It), the probability of photodissociation into channel q at angles k = (Bh, k),... 

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