Radiation Sources (5) Flashcards
1
Q
Natural sources of Radiation
A
- Cosmic
- Decay of naturally occurring elements from earths crust
2
Q
Man-Made Radiation
A
- Medical or industrial X-Rays
- Gamma Radiation from artificially produced radioactive isotopes
3
Q
Internal Exposures
A
Radioactive material is ingested or works into the body from an open wound
4
Q
External Exposure
A
Radiation source from outside of the body
5
Q
Cosmic Radiation
A
- High-Energy particles 9Protons) originating from the sun and stars.
- Interact with the atmosphere forming Carbon-14.
- depending on sea level cosmic radiation exposure differs
- ozone layer filters cosmic radiation but some still enters
6
Q
Decay of Natural Radioactive Elements
A
- from earths crust
- Uranium-238
- takes 7 billion years to decay to lead-206
- can decay to polonium-210 and lead-210 present in air, food and water
- dose depends on surroundings (brick house more than a wood house)
7
Q
Natural sources of Internal Radiation
A
- Radon Gas (disintegration of uranium) from ground, if seeps into your house it is a health concern
- Food (potassium-40 from bananas)
- Smoking (tobacco leaves contain radioactive material (lead-210 and polonium-210) from decay of radium in soil and fertilizer
8
Q
Man-Made sources of radiation
A
- smoke detectors
- luminous dial watches
- fallout from nuke testing
- coal and nuclear power plants
- Medical X-rays and Gamma Radiation
- Nuclear energy facilities
- Industrial radiography
- Industries producing radioactive isotopes
- Hospitals with radioactive isotopes and x-ray equipment
- research labs