cont.

SCINTILLATOR DETECTOR

detectors based on light emission

activator atoms

SCINTILLATOR DETECTOR

Certain organic and inorganic crystals contain BLANK and emit scintillations (light) upon absorption of radiation.

gamma rays

SCINTILLATOR DETECTOR

High atomic number phosphors are mostly used for the measurement of BLANK, while the plastic scintillators are mostly used with beta particles.

SEMICONDUCTOR DETECTOR

They act like solid-state ionization chambers in exposure to radiation.

semiconductor

The high sensitivity of BLANK detectors helps in miniaturizing radiation-monitoring instruments.

FILM BADGE

is a special emulsion photographic film in a light-tight wrapper enclosed in a case or holder with windows with appropriate filters.

FILM BADGE

Which dosimeter uses a special photographic film inside a light-tight holder?

Badge holder

creates a distinctive pattern on the film indicating the type and energy of the radiation received

FILM BADGE

does not have the response of a tissue-equivalent material

100 keV

FILMM BADGE

One filter is adequate for photons of energy above

TLD

badge consists of a set of chips enclosed in a plastic holder with filters.

EVERY 3-4 MONTHS

how often should the dosimeter be submitted to the facility for dose evaluation?

5 keV to 40 MeV

pair of photon energy limits is given for OSL dosimeters

RPL glass

To determine the dose, the glass block is removed from the holder and exposed to ultraviolet radiation in a reader.

OSL

dosimeters contain a thin layer of aluminum oxide (AI203:C).

low-radiation

• OSL dosimeters are highly sensitive;

• This high sensitivity is particularly suitable for individual monitoring in BLANK environments.

Film badge

Radiation changes film

TLD

Heat produces light

RPL

UV light makes glass emit light

OSL

Laser light makes aluminum oxide emit light