deactivation energy

Noun

deactivation energy (countable and uncountable, plural deactivation energies)

1. (physical) The amount of energy needed to slow down or stop a reaction.
   • If we disregard the deactivation energy, which can be done, except, perhaps, for the lowest vibrational levels, then, according to Bates' theoretical computations, the atom-exchange rate constant must be large, ~10⁻¹⁰ cm³sec⁻¹.1971, Geomagnetism and Aeronomy - Volume 11, page 427
   • Activation energy is a measure of the minimum energy needed by the photosynthesis system to react and deactivation energy is the maximum energy the system can cope with before the reaction decreases (Brady 1990).2004, Icelandic Agricultural Sciences - Volumes 16-20, page 46