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29 Cards in this Set
- Front
- Back
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Half life |
The time taken for half the unstable nuclei in a radioactive isotope to decay |
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The activity of any radioactive substance is measured in _______________ |
Becquerels (Bq) |
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Alpha particles contain _________ |
Two protons and two neutrons |
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Beta particles |
•high energy, high speed electrons •charge of –1 |
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Gamma rays |
•high frequency electromagnetic waves •no electric charge |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
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irradiated |
when a source of radioactivity is exposing you, but when the source is removed, the irradiation is stopped |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
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irradiated |
when a source of radioactivity is exposing you, but when the source is removed, the irradiation is stopped |
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contamination |
when a radioactive source gets on you, your clothes or in you. you are irradiated until the source is removed or decayed |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
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irradiated |
when a source of radioactivity is exposing you, but when the source is removed, the irradiation is stopped |
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contamination |
when a radioactive source gets on you, your clothes or in you. you are irradiated until the source is removed or decayed |
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two ways to detect radiation |
•the dosimeter (film badge) •the GM tube (the Geiger counter) |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
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|
radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
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irradiated |
when a source of radioactivity is exposing you, but when the source is removed, the irradiation is stopped |
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contamination |
when a radioactive source gets on you, your clothes or in you. you are irradiated until the source is removed or decayed |
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two ways to detect radiation |
•the dosimeter (film badge) •the GM tube (the Geiger counter) |
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film badges/dosimeters |
•people who are at risk of frequently being exposed to radiation often wear film badges •e.g. people who work at nuclear power stations and medical staff who work in radio therapy |
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Background radiation |
radiation that is present all the time due to natural and man made sources |
|
|
radon gas |
•a colourless, neutral, tasteless, natural radioactive gas •very dangerous •second fréquent cause of cancer |
|
|
irradiated |
when a source of radioactivity is exposing you, but when the source is removed, the irradiation is stopped |
