On the use of corresponding orbitals in the calculation of nonorthogonal transition moments

Full valence and first‐order CI wave functions are invariant with respect to unitary transformations among the valence orbitals. We exploit this degree of freedom and show that by transforming the valence orbitals into a corresponding orbital basis, nonorthogonal transition moment calculations become an easily managed task. Sample full valence calculations on several states of O+2 and OF are also presented.

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