Angle-action variables, unimolecular reaction

In many classical trajectory studies of unimolecular reactions it is often necessary to accurately sample the microcanonical energy surface of a vibrationally excited molecule e.g., C2Hi. F in equation (4). If the good action-angle variables cannot be found, multidimensional selection procedures must be used since the coordinates q and -p- will not have independent probability distributions. ... 

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