Noun
de-excitation (plural de-excitations)
(physics) Alternative form of deexcitation
It was produced, when matter and radiation decoupled, by the de-excitation of hydrogen atoms to the ground state. Source: Internet
Since the Auger effect is not the only mechanism available for atomic relaxation, there is a competition between radiative and non-radiative decay processes to be the primary de-excitation pathway. Source: Internet