How to compute Franck-Condon factors

Franck-Condon factors (FCFs) are needed for modeling vibrational progression in electronic spectra. Most often FCFs are needed for computing UV-VIS and photoelectron spectra, but they also enter other workflows (such as ET rate calculations). FCFs can be computed using stand-alone ezSpectrum code:
which smoothly interacts with Q-Chem’s outputs.
The details are described in ezSpectrum manual:

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