 Photoelectron photoion coincidence spectroscopy

Photoelectron photoion coincidence spectroscopy (PEPICO) is a technique used in molecular physics and chemistry to study the electronic structure and dynamics of molecules. It combines two powerful methods: photoelectron spectroscopy (PES) and photoionization spectroscopy. ### Key Components of PEPICO: 1. **Photoelectron Spectroscopy (PES):** - This technique involves the ionization of molecules by ultraviolet or X-ray photons, resulting in the ejection of electrons from the molecules.