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* Quenching is a general term for non- radiative de- excitation. One major reason for non-radiative de-excitation is collisions. As a consequence is the quenching often heavily dependent on pressure and temperature. Quenching poses a problem for non-instant spectroscopic methods, such as laser-induced fluorescence.- In metallurgy, quenching is the rapid cooling of a metal (most commonly steel) to lock it into a hard crystal structure rather than allow allow it to cool slowly and revert to a softer structure.
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