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Introduction

Given the two sets of configuration lists, wave functions and eigenvectors, biotr evaluates the transition data between the two CI expansions, ${\Psi_1\mid \sum_{i} \hat{O}(i) \mid \Psi_2}$, with ${\hat{O}(i)}$ representing a magnetic or electric transition probability operator of any order.

The calculation is non-relativistic when the eigenvectors were obtained using the mchf method. In this case the program expects to find the eigenvectors in a file with a .l suffix. If the user had applied the relativistic corrections using the Breit-Pauli method, the transitions determined by biotr will include the relativistic effects as well. In this case the program expects to read the eigenvectors from a file with .j suffix. In biotr, the initial and final states, which may not be orthogonal, are transformed in such a way that the orbitals are orthogonal between states so that orthogonal methods may be used to evaluate the transition matrix elements [#!mrg-bio!#].



2001-10-11