Topic 4-Background Radiation

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  • Created by: claire
  • Created on: 09-06-17 06:56
What is a defintion of background radiation?
It is the low level radiation that is around us at all times.
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Where does background radiation come from?
Naturally occurring unstable isotopes=air, food, building materials and rocks. From space=cosmic rays. Human activity=fallout from nuclear explosions or nuclear waste (this is a very small percentage though).
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What is radiation dose measured in?
Sieverts (Sv) or millisieverts (mSv).
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What is irrradiation?
It is exposure to background radiation.
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What is contamination in terms of radiation?
It is when radioactive particles get onto objects.
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What are the most dangerous sources of radiation?
Beta and gamma rays as they can penetrate the skin whereas alpha can't.
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What is the major concern of working with alpha sources?
Contamination.
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Card 2

Front

Where does background radiation come from?

Back

Naturally occurring unstable isotopes=air, food, building materials and rocks. From space=cosmic rays. Human activity=fallout from nuclear explosions or nuclear waste (this is a very small percentage though).

Card 3

Front

What is radiation dose measured in?

Back

Preview of the front of card 3

Card 4

Front

What is irrradiation?

Back

Preview of the front of card 4

Card 5

Front

What is contamination in terms of radiation?

Back

Preview of the front of card 5
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