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In Course: GCSE Physics (AQA): Paper 1

AQA GCSE Physics: Uses, Fission and Fusion

Covers the uses of nuclear radiation in medicine (exploration and treatment) and industry, linking uses to the properties of the radiation and the half-life of the source. Describes the processes of nuclear fission (including chain reactions) and nuclear fusion, and their roles in power generation and stars.

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Deck Contents

33 Cards
Lesson#1
In this deck, we'll explore the powerful applications of nuclear radiation. We'll start by looking at how it's used in medicine and industry, from treating cancer to ensuring the quality of everyday products. Then, we'll delve into the two most powerful nuclear processes: fission, the splitting of atoms that powers our nuclear reactors, and fusion, the joining of atoms that powers the Sun and all the stars.
Lesson#2
One of the most important uses of radiation in medicine is in medical tracers. A radioactive isotope is attached to a chemical that the body uses, and is then injected into or swallowed by the patient. Its journey through the body can be tracked using an external detector. This allows doctors to see how well organs are functioning, for example, by showing if a kidney is blocked.
Quiz#3
In medicine, what is a radioactive substance used to track processes inside the body called?

a medical tracer

Lesson#4
The choice of isotope for a medical tracer is crucial. It must emit a type of radiation that can pass out of the body to be detected. This means it has to be gamma radiation, as alpha and beta would be absorbed by the body's tissues. The isotope must also have a short half-life, typically just a few hours. This ensures it decays quickly, delivering a low overall dose of radiation to the patient.
Quiz#5
What type of radiation must be emitted by a medical tracer so it can be detected outside the body?

gamma radiation

Quiz#6
Why is gamma radiation suitable for use in medical tracers?

it is highly penetrating

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