fluorescence

柯林斯詞典

fluorescence /?fl???r?s?ns/

• 1. N the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state 熒光

• 2. N such an emission of photons that ceases as soon as the bombarding radiation is discontinued 非持續(xù)熒光

• 3. N such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10–8 seconds 短暫性熒光

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