Abstract
A method based on maximum entropy is developed in order to calculate the impact parameter distribution P(b) for dissociation of a parent compound into two fragments. The method provides the least biased P(b) distribution based on (1) whatever dynamical data are available and (2) the prior statistical information, which includes conservation of energy, linear momentum, and angular momentum. This information can often be used to decide whether a dissociation producing two fragments is concerted or stepwise. The data used to determine P(b) can include, for example, the vibrational and/or rotational distribution of the fragment(s), the recoil velocity distribution, and vector correlations. The method is illustrated by use of recent data on the photodissociation of formaldehyde.
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