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Questions and Answers
What is ionizing radiation?
Radiation with the ability to knock electrons out of orbit, disrupting the electron/proton balance, potentially resulting in cellular damage.
Which of the following is a type of naturally occurring radiation found in the body?
What is the unit for measuring the dose of ionizing radiation absorbed by tissue?
What is the average natural background radiation level in Canada?
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What is the effective dose limit for a nuclear energy worker over five years?
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The annual dose limit for the general public is 50 mSv.
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What type of emitter is 99mTechnetium?
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The average natural background radiation worldwide is ___ mSv.
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Study Notes
Introducing Radiation Detection
- Ionizing radiation is capable of displacing electrons from their orbits, disrupting the balance of electrons and protons in atoms, and potentially causing cellular damage.
- Examples of ionizing radiation include alpha, beta, gamma, neutron radiation, and x-rays.
- The dose of radiation is the amount of energy absorbed by tissue from ionizing radiation, measured in Sieverts (Sv).
Natural Radiation Sources
- Natural radioactive elements like Polonium-210, carbon-14, and potassium-40 occur naturally within the body and can be found in foods, especially red meat, white potatoes, carrots, bananas, lima beans, and brazil nuts.
- In Canada, the average natural background radiation level is estimated to be 1.8-2mSv, lower than the global average of 2.5mSv, and poses no danger.
Canadian Nuclear Association: Radiation
- The Canadian Nuclear Association (CNA) provides information on radiation and its sources.
Sources of Radiation Exposure
- CNSC (Canadian Nuclear Safety Commission) set limits for the annual and five-year effective dose of radiation.
- The annual limit for nuclear workers is 50mSv, while the general public has a limit of 1 mSv.
- The average annual Canadian exposure to natural background radiation is 1.8mSv.
Ionizing Radiation
- Ionizing radiation is any radiation capable of displacing electrons from atoms, creating ions.
- Technetium-99m is a radioactive isotope commonly used in medical imaging.
Detection of Radiation
- Detecting radiation relies on the energy it carries. When this energy interacts with a detection medium, it deposits some or all of its energy into the material.
- The released electrons from this interaction are used to detect and measure the presence of radiation.
Basic Principle for Detection
- Radiation interacts with matter in multiple ways, resulting in the release of electrons.
- These electrons are then utilized for detecting and measuring the presence of radiation.
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Description
This quiz covers essential information about radiation detection, including the types of ionizing radiation and their effects on human cells. It also discusses natural radiation sources, the average radiation levels in Canada, and insights from the Canadian Nuclear Association. Test your knowledge on these fundamental aspects of radiation.
