A state of an atom, molecule, or ion when the species has absorbed energy and become elevated ("excited") to a higher energy state as compared with the ground state. The excitation may be electronic, vibrational, rotational, etc. Excited states tend to have short lifetimes; they lose energy either through collisions or by emitting photons to "relax" back down to their ground states.
Related entry excitation
Related category• ATOMIC AND NUCLEAR PHYSICS
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact