The Franck-Condon principle explains the intensity distribution of vibronic transitions in molecules, highlighting that electronic transitions occur so rapidly that the nuclei remain in their initial positions. This leads to transitions being most probable between vibrational states that have the greatest overlap of their nuclear wave functions, often visualized using Franck-Condon factors.

Franck-Condon Principle

Franck-Condon principle

Intensity distribution refers to the variation of intensity across a given area, often used in fields like optics, acoustics, and imaging to describe how energy or signal strength is spread over space. Understanding intensity distribution is crucial for analyzing patterns, optimizing system performance, and interpreting data in scientific and engineering applications.

intensity distribution

vibronic transitions

Electronic transitions involve the movement of electrons between different energy levels within an atom or molecule, typically induced by the absorption or emission of photons. These transitions are fundamental to understanding phenomena such as spectroscopy, chemical reactivity, and the electronic properties of materials.

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