Scintillators and Luminescent Materials Quiz

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Questions and Answers

Which property of luminescence is exhibited by a scintillator when excited by ionizing radiation?

Phosphorescence (correct)
Emission
Absorption
Delayed fluorescence

What type of transition determines whether a scintillator exhibits delayed fluorescence or phosphorescence?

Electronic transition (correct)
Metastable transition
Ionizing transition
Relaxation transition

What is a scintillation detector or scintillation counter obtained when a scintillator is coupled to?

A light sensor (correct)
An electronic circuit
A power supply
A radioactive source

Which electronic light sensor absorbs the light emitted by a scintillator in a scintillation detector?

Photomultiplier tube (PMT) (A) Signup and view all the answers

What does a scintillator do when struck by an incoming particle?

Re-emit the absorbed energy as light (D) Signup and view all the answers

Match the following terms with their correct definitions:

Scintillator = A material that exhibits scintillation when excited by ionizing radiation Scintillation = The property of luminescence exhibited by a scintillator when excited by ionizing radiation Delayed Fluorescence = The phenomenon that occurs when the excited state of a scintillator is metastable and the relaxation back down to lower states is delayed Scintillation Detector = An electronic device obtained when a scintillator is coupled to an electronic light sensor Signup and view all the answers

Match the following terms with their corresponding explanations:

Metastable State = The excited state of a scintillator that is delayed in relaxation back down to lower states Photomultiplier Tube (PMT) = An electronic light sensor that can be coupled to a scintillator in a scintillation detector Phosphorescence = The phenomenon that occurs when the type of transition in a scintillator corresponds to a longer wavelength of the emitted optical photon Luminescent Material = Materials that scintillate when struck by an incoming particle, i.e. re-emit the absorbed energy in the form of light Signup and view all the answers

Match the following terms with their correct descriptions:

Ionizing Radiation = The type of radiation that excites a scintillator and causes it to exhibit scintillation Relaxation Time = The time delay required for the relaxation back down from the excited state to lower states in a scintillator Silicon Photomultiplier = An electronic light sensor that can be coupled to a scintillator in a scintillation detector Incoming Particle = The particle that strikes a scintillator and causes it to scintillate Signup and view all the answers

Match the following terms with their correct meanings:

Absorption = The process by which luminescent materials capture the energy of an incoming particle Excited State = The state of a scintillator when it absorbs the energy of an incoming particle Electronic Light Sensor = A device that detects and measures the light emitted by a scintillator Optical Photon = The form in which the absorbed energy is re-emitted by a scintillator in the process of scintillation Signup and view all the answers

Match the following terms with their appropriate definitions:

Scintillation Counter = An electronic device obtained when a scintillator is coupled to an electronic light sensor Photodiode = An electronic light sensor that can be coupled to a scintillator in a scintillation detector Incoming Particle = The particle that strikes a scintillator and causes it to scintillate Delayed Fluorescence = The phenomenon that occurs when the excited state of a scintillator is metastable and the relaxation back down to lower states is delayed Signup and view all the answers

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