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Sources of background radiation and dose units

Atomic structure • Radiation hazards and uses

Key concepts

What you'll likely be quizzed about

  • Natural background radiation originates from cosmic rays that penetrate the Earth's atmosphere, and from radioactive substances present in the Earth, such as uranium and thorium.
  • Radon gas, which is produced from the decay of uranium in soil, accumulates in buildings and can contribute significantly to indoor radiation levels.
  • Regions with high natural radioactivity, like those with granite formations, exhibit greater background radiation levels.

Flashcards

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What are some artificial sources of background radiation?

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Artificial sources include medical X-rays, radiation therapy, and fallout from nuclear tests.

Key notes

Important points to keep in mind

Background radiation comes from natural and artificial sources.

Radon gas can accumulate indoors, increasing exposure.

Dose is measured in sieverts, reflecting biological impact.

Understanding sources aids in radiation safety practices.

Geographical factors influence local background radiation levels.

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