Sources of ionizing radiation
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8 Terms
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what is ionization?
gain or loss of an electron
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what is an “ion pair”?
atom that has been ionized and liberated.
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Natural Radiation
3 mSv /year or
300 mrem/year
• Cosmic rays
– sun & stars
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Terrestrial radiation
uranium,
thorium,
radon
– radon- largest source
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Internally deposited radionuclides
Potassium 40
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Artificial Radiation
3.1 mSv/year
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Medical/Dental X-rays
(3.0 mSv/year or 300 mrem/year)
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Nuclear Energy Plants
Consumer Items
• Exit signs
• Smoke detectors
• Camping lanterns
• Airport surveillance systems
Note 
Flashcards (27)