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词汇 Organic scintillator
分类 英语词汇 英语翻译词典
释义

Organic scintillator

英语百科

Scintillator

Scintillation crystal surrounded by various scintillation detector assemblies.
Extruded plastic scintillator material fluorescing under a UV inspection lamp at Fermilab for the MINERνA project
Alpha scintillation probe for detecting surface contamination under calibration

A scintillator is a material that exhibits scintillation — the property of luminescence when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate, (i.e., re-emit the absorbed energy in the form of light). Sometimes, the excited state is metastable, so the relaxation back down from the excited state to lower states is delayed (necessitating anywhere from a few nanoseconds to hours depending on the material): the process then corresponds to either one of two phenomena, depending on the type of transition and hence the wavelength of the emitted optical photon: delayed fluorescence or phosphorescence, also called after-glow.

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