Using plane class fat double-decked model, from potential barrier penetration angle discussion high pressure electric field to cell membrane permeability influence.

The Barrier Penetration Model has been used to calculate the heavy ion fusion cross section and it does give a good description of the experimental data in existence.

Intermolecular electron transfer, which is known to play usually a dominant role in photoelectric conversion processes, is regarded as an electronic intermolecular barrier penetration process.