Abstract
The Auger transition rates in methane are calculated by using the molecular continuum orbitals and taking into account the exchange interaction between the ejected electron and the bound electrons. The exchange interaction considerably enhances the rate for the (2a 1 ) −2 1 A 1 process. Comparison is made with the rates obtained using some approximate exchange potentials and those using the exact exchange potential. Further, the approximation in which the MOs of the neutral molecule are used instead of those of the molecular ion (the initial state of the Auger process) is investigated.
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