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4. Passive dosimeters
The detector does not require any power source to operate. The measurement result represents the integrated dose corresponding to the dosimeter's exposure period. It can only be known after the exposure period.
Today, operating procedures are usually automated by laboratories, and receive particular attention in terms of quality assurance. However, interpreting results, particularly in the event of an accident, remains a delicate task and relies on the know-how of a limited number of experts.
Many passive dosimetry badges use several different passive dosimetry techniques. They include, for example, several film emulsions with various screenings, one or more radiophotoluminescent (RPL) or thermoluminescent elements (screened or unscreened) and possibly activatable elements for criticality dosimetry....
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Passive dosimeters
Active dosimeters (operational dosimeters)
Bibliography
References
- (1) - van DIJK (J.W.E.), BORDY (J.M.), VANHAVERE (F.), WERNLI (C.), ZAMANI-VALASIADOU (M.) - A review of the properties of the dosimetric systems and the quality assurance programmes of 48 dosimetric services in the European Union and Switzerland. - Radiation-Protection-Dosimetry, vol. 96, n° 1, p. 151-157 (2001)....
Standardization
The International Organization for Standardization (ISO) website can be consulted:
Standards dealing with references or methods
- Reference X-rays and gamma rays for calibrating dosimeters and flowmeters, and for determining their response as a function of photon energy. – Part 1: Radiation characteristics...
Regulations
ICRU documents relating to the measurement of external radiation doses :
ICRU 39 (1985) Determination of Dose Equivalents Resulting from External Radiation Sources ;
ICRU 43 (1988) Determination of Dose Equivalents from External Radiation Sources – Part 2 ;
ICRU 47 (1992) Measurement of Dose Equivalents from...
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