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LUMINESCENCE

Physics

LUMINESCENCE

1. A process where energy from an external source is absorbed and re-emitted as visible light.

TWO TYPES
2. Fluorescence - (near) instantaneous emission of light following energy input.
3. Phosphorescence - delayed emission of light (known as afterglow).

MATERIALS
4. A luminescent material is known as a phosphor.
5. Crystalline materials used to detect gamma radiations are known as scintillants.
6. Some phosphors only emit light after further input of energy - thermoluminescence (after heat input), photostimulable luminescence (after light input).


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REFERENCES

1. Bushberg, J. T. (2012). The essential physics of medical imaging. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. Find it at Amazon
2. Heggie, J. C., Liddell, N. A., & Maher, K. P. (1997). Applied imaging technology. Melbourne: St. Vincents Hospital.

Ⓒ A. Manickam 2018

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