digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Electronic Personal Dosimeter (EPD, Soeks 01M in particular). These give a dose rate, accumulated dose reading and usually have alarm functions.

A radiation dosimeter is a device that measures exposure to ionizing radiation. It has two main uses: for human radiation protection and for measurement of dose in industrial processes.

Personal dosimeters[1][edit]

The personal ionising radiation dosimeter is of fundamental importance in the disciplines of radiation dosimetry and radiation health physics and is primarily used to estimate the radiation dose deposited in an individual wearing the device.

Ionising radiation damage to the human body is cumulative, and is related to the total dose received, for which the SI unit is the sievert. Workers exposed to radiation, such as radiographers, nuclear power plant workers, doctors using radiotherapy, those in laboratories using radionuclides, and HAZMAT teams are required to wear dosimeters so a record of occupational exposure can be made. Such devices are known as "legal dosimeters" if they have been approved for use in recording personnel dose for regulatory purposes.

Dosimeters can be worn to obtain a whole body dose and there are also specialist types that can be worn on the fingers or clipped to headgear, to measure the localised body irradiation for specific activities.


Common types of personal dosimeters for ionizing radiation include:

Electronic Personal Dosimeter (EPD)[edit]

The Electronic Personal Dosimeter (EPD) is an electronic device, which has a number of sophisticated functions such as continual monitoring which allows alarm warnings at preset levels and live readout of dose accumulated. These are especially useful in high dose areas where residence time of the wearer is limited due to dose constraints. The dosimeter can be reset, usually after taking a reading for record purposes and thereby re-used multiple times.

Film badge dosimeter[edit]

Main article: Film badge dosimeter

Film badge dosimeters are for one-time use only. The level of radiation absorption is indicated by a change to the film emulsion, which is shown when the film is developed.

Quartz fiber dosimeter[edit]

Quartz fiber dosimeters are charged to a high voltage. As the gas in the dosimeter chamber becomes ionized by radiation the charge leaks away, causing the fiber indicator to change against a graduated scale.[2]

Thermoluminescent dosimeter (TLD)[edit]

A thermoluminescent dosimeter measures ionizing radiation exposure by measuring the intensity of visible light emitted from a crystal in the detector when heated. The intensity of light emitted is dependent upon the radiation exposure.

Both the quartz fiber and film badge types are being superseded by the TLD and the EPD.

Radiation protection dose quantities[edit]

Main article: sievert
External radiation dose quantities used in radiological protection - based on ICRU report 57

The dosimeter plays an important role within the international radiation protection system developed by the International Commission on Radiological Protection (ICRP) and the International Commission on Radiation Units and Measurements (ICRU). This is shown in the accompanying diagram.

Protection quantities[edit]

The protection quantities are used as "limiting quantities" to specify exposure limits to ensure that the occurrence of stochastic health effects is kept below unacceptable levels and that tissue reactions are avoided.[3][4][5] These quantities cannot be practically measured and are a calculated value of irradiation of organs of the human body, which is arrived at by using a anthropomorphic phantom. This is a 3D computational model of the human body which attempts to take into account a number of complex effects such as body self-shielding and internal scattering of radiation.[6]

As protection quantities cannot practically be measured, operational quantities are used to relate them to practical radiation instrument and dosimeter responses.[7]

Operational quantities[edit]

Operational quantities are aimed at providing an estimate or upper limit for the value of the protection quantities related to an exposure. They are used in practical regulations or guidance. These relate real-life operational instrument measurements and responses to the calculated protection quantities.[8]

Personal dose equivalent, Hp(d), is defined by the ICRP as the dose equivalent in soft tissue at an appropriate depth, d, below a specified point on the human body. The specified point is usually given by the position where the individual’s dosimeter is worn.[9]

Instrument and dosimeter response[edit]

This is an actual reading obtained from such as an ambient dose gamma monitor, or a personal dosimeter. The dosimeter is calibrated in a known radiation field to ensure display of accurate operational quantities and allow a relationship to known health effect. The personal dose equivalent is used to assess dose uptake, and allow regulatory limits to be met. It is the figure usually entered into the records of external dose for occupational radiation workers.

Dosimeter Calibration[edit]

The "slab" phantom is used to represent the human torso for calibration of whole body dosimeters. The IAEA states "The slab phantom is 300 mm × 300 mm × 150 mm depth to represent the human torso".[10]

Process irradiation verification[edit]

Manufacturing processes that treat products with ionizing radiation, such as food irradiation, use dosimeters to calibrate doses deposited in the matter being irradiated. These usually must have a greater dose range than personal dosimeters, and doses are normally measured in the unit of absorbed dose ; the gray (Gy). The dosimeter is located on or adjacent to the items being irradiated during the process as a validation of dose levels received.


See also[edit]


  1. ^ phd1
  2. ^ Frame, Paul (2007-07-25). "Pocket Chambers and Pocket Dosimeters". Health physics historical instrument museum collection. Oak Ridge Associated Universities. Retrieved 2008-11-08. 
  3. ^ ICRP publication 103, paragraph 112
  4. ^ ICRP publication 103, paragraph B50
  5. ^ "In 1991, the International Commission on Radiological Protection (ICRP) [7] recommended a revised system of dose limitation, including specification of primary limiting quantities for radiation protection purposes. These protection quantities are essentially unmeasurable" - IAEA Safety report 16
  6. ^ ICRP publication 103, paragraph B64
  7. ^ ICRP publication 103, paragraph B146
  8. ^ ICRP publication 103, paragraph B147
  9. ^ ICRP pub 103 glossary
  10. ^ IAEA safety report 16

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Dosimeter — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
9047 videos foundNext > 

What is a Dosimeter?

This animatione describes what a Dosimeter is doing and where the difference to a Geiger counter is.

Civil Defence V 750 Charger and Dosimeter pens.

Just a video showing how it works. Once again I bought this mainly because I find technology from the 40's 50's and 60's interesting, This being early cold w...

Nick Thayer - Dosimeter ft The Crystal Method (NEST EXCLUSIVE)

Available exclusively on the NEST 6/17/13 NEST: http://drip.fm/owsla/releases/nick-thayer-worlds-collide-ep#j Like Nick Thayer: http://facebook.com/nickthaye...

Wie können Dosimeter schützen?

Wofür braucht man Dosimeter am Arbeitsplatz und was genau sind Dosimeter eigentlich? Musik-Titel: Weller - Just | Künstler: Gruenanlage.com Dieses Video ist ...

Radex RD1706 vs Terra-P MKS-05 dosimeter comparison (background radiation)

The Radex RD1706 features two Geiger Muller detector tubes while the Terra P comes equipped with only a single tube. They are both new generation dosimeters,...

Ark Two #16 Rechargable Dosimeters

In the video Bruce explains about dosimeters and using a charger. He gives advice on what type of dosimeter is most useful & how to use one. Ark Two is a 10,...

Quest NoisePro® Noise Dosimeter

http://galsonlabs.com The NoisePro DLX noise dosimeter measures and reports basic noise exposure data. This video will demonstrate setting up the instrument ...

Siemens EPD Electronic Personal Dosimeter Thermo Radiation

Quick guide on how to operate Electronic Personal Dosimeter (EPD)

Homemade Geiger Counter Dosimeter

This is a Homemade Geiger Counter and Dosimeter project, using a SBM-20-1 GM tube, controlled by an ATtiny2313 microcontroller (PWM output). The tube was bou...

Dosimeter "Bella"

Dosimeter "Bella" with 1 x SBM-20 geiger tube. for more visit http://pripyat.de.

9047 videos foundNext > 

73 news items

UCR Today (press release)

UCR Today (press release)
Tue, 28 Oct 2014 16:37:30 -0700

Third, Losini Amarasan, Multimedia University, Malaysia, “Silica fibre: The next material for thermoluminescence dosimeter (TLD).” Ten finalists took part, including Corey Hardin, who is working on his Ph.D. with Javier Garay, a professor of mechanical ...

HNN Huntingtonnews.net

HNN Huntingtonnews.net
Wed, 29 Oct 2014 00:52:30 -0700

... toxicology determinations place in doubt compensation and disability determinations of all Energy Worker Occupational Compensation (EEOICPA) decisions, which rely on a sophisticated formula for re-creating and estimating worker dosimeter exposures ...

Space News

Space News
Fri, 24 Oct 2014 07:40:03 -0700

“Measurements of a personal dosimeter dramatically overstate the exposure of an astronaut, in the worst case by a factor of three,” according to a summary of the results by a Euro-Russian team. “[I]n an outside exposure the self-shielding of the human ...

Daily Beast

Daily Beast
Sun, 26 Oct 2014 02:56:15 -0700

4M's ham radio handle is JT65B, and you can join in using the freely available Weak Signal Communication Software package. The 4M craft also includes a radiation dosimeter built by the Spanish company iC-Málaga. (The name 4M honors Manfred Fuchs, ...
Yahoo News UK
Thu, 23 Oct 2014 05:33:45 -0700

Further, 4M is equipped with a tiny dosimeter, provided by Spanish company iC-Málaga, which will record radiation levels during the mini-probe's mission. View gallery. First Private Moon Mission to Launch on Chinese Rocket …. The 4M payload ...

SpaceFlight Insider

SpaceFlight Insider
Sun, 05 Oct 2014 01:00:59 -0700

The experiment consisted of two handheld radiation monitors, Gamma and Electron Dosimeter and a Neutron and Proton Dosimeter. This experiment featured equipment developed by the prestigious Central Research Institute for Physics, out of Budapest, ...
GlobeNewswire (press release)
Wed, 15 Oct 2014 05:33:45 -0700

VeriTeQ develops innovative, proprietary RFID technologies for implantable medical device identification, and dosimeter technologies for use in radiation therapy treatment. VeriTeQ offers the world's first FDA cleared RFID microchip technology that can ...
GlobeNewswire (press release)
Thu, 09 Oct 2014 05:22:30 -0700

VeriTeQ develops innovative, proprietary RFID technologies for implantable medical device identification, and dosimeter technologies for use in radiation therapy treatment. VeriTeQ offers the world's first FDA cleared RFID microchip technology that can ...

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight