Radiation Sources (5)

Question 1

Natural sources of Radiation

Answer 1

• Cosmic

- Decay of naturally occurring elements from earths crust

Question 2

Man-Made Radiation

Answer 2

• Medical or industrial X-Rays

- Gamma Radiation from artificially produced radioactive isotopes

Question 3

Internal Exposures

Answer 3

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

Question 4

External Exposure

Answer 4

Radiation source from outside of the body

Question 5

Cosmic Radiation

Answer 5

• 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

Question 6

Decay of Natural Radioactive Elements

Answer 6

• 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)

Question 7

Natural sources of Internal Radiation

Answer 7

• 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

Question 8

Man-Made sources of radiation

Answer 8

• 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