Zhao-Rice approximation

Zhao-Rice Approximation Reactive Island Theory... 

Zhao and Rice extended the above-sketched Gray-Rice theory to include the effects of intramolecular energy transfer, using analytical approximations for various quantities [15]. Because this extension is in the same spirit as in the case of unimolecular predissociation, the Zhao—Rice approximation presented here is still called the MRRKM theory. Zhao and Rice employed a model double-well potential similar to that used by Gray and Rice, but parameterized to have greater flexibility. Specifically, the three terms in the potential of Eq. (201) are taken to have the following form ... 

---