Radiation Sources (5) Flashcards

1
Q

Natural sources of Radiation

A
  • Cosmic

- Decay of naturally occurring elements from earths crust

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2
Q

Man-Made Radiation

A
  • Medical or industrial X-Rays

- Gamma Radiation from artificially produced radioactive isotopes

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3
Q

Internal Exposures

A

Radioactive material is ingested or works into the body from an open wound

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4
Q

External Exposure

A

Radiation source from outside of the body

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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
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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)
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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
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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
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