Terms (3)

Question 1

Dose Rate/Radiation Intensity

Answer 1

Directly proportional to the activity of the Radionuclide, more rays=more ionization

• Dose rate does not determine power of penetration, only the number of rays available to take an exposure.
• (total number of ion pairs created per volume, per unit of time)
• Diminishes as source decays
• Intensity determines the time of exposure

Question 2

Equation for Dose Rate

Answer 2

Activity or strength x Characteristic intensity = Intensity or Dose rate (total number of ion pairs created per volume, per unit of time)

Question 3

Energy/Quality of Radiation

Answer 3

Dependant on the radioisotope that produced it and is always the same for a specific
isotope.
- Determines how much material it will penetrate before it is reduced.

Question 4

Primary Radiation

Answer 4

Radiation produced in an X-Ray or following decay of a radionuclide

• Some rays pass through material, some are absorbed
• Used for Radiography

Question 5

Scattered Radiation

Answer 5

Gamma Radiation produces an orbital electron and photon travelling opposite from the direction of incident, Radiation as a result of this is considered Scattered.
- Long wavelength/less penetrating
Examples are:
- Photoelectrons
- Compton Recoil Electrons
- Scattered Photons
- Bremsstrahlung Electrons

Question 6

Front Scatter Radiation

Answer 6

Scattered Radiation the hits an object in the primary radiations path

Question 7

Back Scatter Radiation

Answer 7

Scattered Radiation that escapes through a specimens walls or floor