After a successful calculation, fcf produces a TAPE61 KF file. All results are stored in the Fcf section:
| contents of TAPE61 | comments |
| firstmode, lastmode | the first and last vibrational mode taken into account |
| lambda | the minimum value of the electron-phonon coupling |
| maxl1, maxl2 | maximum level (or maximum number of vibrational quanta) in both states |
| translate, rotate | whether the TRANSLATE and ROTATE options were specified in the input |
| natoms | number of atoms in the molecule |
| mass | atomic mass vector (m) |
| xyz1, xyz2 | equilibrium geometries of both states (x0 and x0') |
| b0 | zero-order axis-switching matrix matrix (B0) |
| nmodes | number of vibrational modes with a non-zero frequency |
| gamma1, gamma2 | reduced frequencies of both states (Γ and Γ') |
| lmat1, lmat2 | mass-weighted normal modes of both states (L and L') |
| jmat | Duschinsky rotation matrix (J) |
| kvec1, kvec2 | displacement vectors for both states (k and k', kvec1 is used for the calculation of the Franck-Condon factors) |
| lambda1, lambda2 | electron-phonon couplings for both states (λ and λ') |
| maxp1, maxp2 | maximum number of permutations of maxl1/maxl2 quanta over the vibrational modes |
| i0 | ground state to ground state overlap integral (I0,0) |
| freq1, freq2 | frequencies of every permutation of the vibrational quanta for both states |
| fcf | maxp1 by maxp2 Franck-Condon factor matrix |
| fcfsum1, fcfsum2 | average sum of the Franck-Condon factors for both states |
In addition to producing a binary TAPE61 file, fcf also writes the frequencies, displacement vectors and electron-phonon couplings for both states to the standard output.
