Measuring Radiation (3)

Question 1

Monitoring Devices

Answer 1

Measure radiation levels by the properties of particulate radiation (mostly Beta Particles)

Question 2

Survey Meter

Answer 2

If high-energy radiation ionizes gases and the volume of gas and number of Ion Pairs created is known then radiation can be measured via Survey Meter.
- Measures in R/h (1R= 2.08x10⁹ Ion Pairs in 1 m²of air)

Question 3

How can we use chemical compounds to calculate radiation dose/stored energy?

Answer 3

Chips of chemical compounds have atomic imperfections where free electrons can be trapped, when chips are heated the electrons are released, the amount of emitted light is proportional to stored energy/radiation dose.

Question 4

Darkening of Photographic Emulsion

Answer 4

• First method used to detect radiation
• special film in a light-proof envelope when striken by radiation, the silver halide is ionized, creating a latent image once developed.
• The darkening of film is related to quantity of radiation

Question 5

Scintillator

Answer 5

A solid or liquid with the ability to absorb ionizing radiation, and convert some of the energy into ultraviolet photons (light pulse) which only lasts a few seconds.
- used in hand held-held survey meters

Question 6

Photomultiplier

Answer 6

Used with a Scintillator, the light pulse is measured by a Photomultiplier that converts the light into an electric signal.