# Dominant channels of vibronic transitions in molecules with several identical modes

*Bilha Segev and A.V. Sergeev*

## Abstract

Weakcoupling radiationless transitions (internal conversion or inter system crossing)
are studied assuming separability and symmetry over *N* identical modes. FranckCondon
factors control the branching ratios between exciting just one of the equivalent modes,
or equally distributing the available energy. The dominant process can be predicted by
an exact quantum mechanical solution if the wavefunctions are known (Gaussian initial
distributions and accepting Morse or Poeschl Teller oscillators, for example); or more
generally by a Wigner phase space *surfacejumping* analysis based on a classical limit of
the Wigner function, using only the donor distribution and the acceptor potential surface.

Text of the paper: PDF format, TeX file.

6 separate figure files: 1, 2, 3,
4, 5, 6.

Paper from the journal in PDF format.

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Designed by A. Sergeev.