de-excitationn.

Etymology: de- prefix 2a.Previous versions of the OED give the stress as: de-exciˈtation.

Physics.

The induced transition of an atom or other quantized system from an excited state to the ground state (or a lower excited state); the action of producing such a transition.

ΚΠ

1964 Proc. Physical Soc. 83 769 The theory of vibrational de-excitation in collisions should be most accurate for these simple molecular systems.

1968 M. S. Livingston Particle Physics xii. 217 Neutrinos are also not constituents of matter, but are radiated..in a variety of deexcitation transitions of nucleonic or particle states.

1970 Nature 17 Oct. 277/2 The de-excitation of a molecule and the appearance of a quantum of luminescent light is a discrete process.

Derivatives

de-exˈcite v. (transitive) to cause the de-excitation of.

ΚΠ

1960 McGraw-Hill Encycl. Sci. & Technol. IX. 85/2 Spontaneous neutron emission takes place and serves very rapidly to de-excite the nucleus.

1964 Proc. Physical Soc. 83 769 The theory..predicts that light molecules will be effective in de-exciting vibrationally excited oxygen molecules.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2019).

单词	de-excitation
释义	de-excitationn. Etymology: de- prefix 2a.Previous versions of the OED give the stress as: de-exciˈtation. Physics. The induced transition of an atom or other quantized system from an excited state to the ground state (or a lower excited state); the action of producing such a transition. ΚΠ 1964 Proc. Physical Soc. 83 769 The theory of vibrational de-excitation in collisions should be most accurate for these simple molecular systems. 1968 M. S. Livingston Particle Physics xii. 217 Neutrinos are also not constituents of matter, but are radiated..in a variety of deexcitation transitions of nucleonic or particle states. 1970 Nature 17 Oct. 277/2 The de-excitation of a molecule and the appearance of a quantum of luminescent light is a discrete process. Derivatives de-exˈcite v. (transitive) to cause the de-excitation of. ΚΠ 1960 McGraw-Hill Encycl. Sci. & Technol. IX. 85/2 Spontaneous neutron emission takes place and serves very rapidly to de-excite the nucleus. 1964 Proc. Physical Soc. 83 769 The theory..predicts that light molecules will be effective in de-exciting vibrationally excited oxygen molecules. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2019). < n.1960
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