What is the principle of scintillation?

A scintillation counter is an instrument for detecting and measuring ionizing radiation by using the excitation effect of incident radiation on a scintillator material and detecting the resultant light pulses.

Which one is an example of scintillator detector?

Cesium iodide (CsI) in crystalline form is used as the scintillator for the detection of protons and alpha particles. Sodium iodide (NaI) containing a small amount of thallium is used as a scintillator for the detection of gamma waves and zinc sulfide (ZnS) is widely used as a detector of alpha particles.

What is scintillation detector gamma rays?

The thallium-activated sodium iodide detector, or NaI(Tl) detector, responds to the gamma ray by producing a small flash of light, or a scintillation. The scintillation occurs when scintillator electrons, excited by the energy of the photon, return to their ground state.

How do scintillator detectors work?

In scintillation detectors the material of the detector is excited to luminescence (emission of visible or near-visible light photons) by the absorbed photons or particles. The number of photons produced is proportional to the energy of the absorbed primary photon. The light pulses are collected by a photo- cathode.

What is the difference between organic and inorganic scintillators?

Decay is slower for heavier particles. There are significant differences between inorganic (crystal) scintillators and organic (crystals, liquid, plastic) scintillators….3. Scintillation efficiency.

items inorganic organic
temperature dependence large small

What is the use of scintillation counter?

Scintillation counters measure radioactivity in liquid samples, whereas autoradiography is used to locate radioactive molecules on gels or membranes. Scintillation counters can also be used to measure light generated by chemical reactions.

What does the scintillator do in a gamma camera?

The scintillator is the component of a gamma camera which receives the gamma rays emitted from a radionuclide in a nuclear medicine scan and converts it to visible light photons. It is located just behind the collimator device.