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Gamma radiation and the inverse square law
Test your knowledge of nuclear shapes and sizes!
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What school or college do you attend?
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Your answer
Which of the following statements is correct?
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1 point
When gamma-rays are emitted from an unstable nucleus, the atomic number of the nucleus changes and the mass remains the same
When gamma-rays are emitted from an unstable nucleus, the mass of the nucleus changes and the atomic number remains the sam
When gamma-rays are emitted from an unstable nucleus, the atomic number and mass remains the same
Which of these should be used to absorb gamma radiation?
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1 point
A sheet of paper
A 1mm thick piece of aluminium
A 2cm thick piece of lead
What do gamma-ray detectors need to measure when performing gamma-ray spectroscopy?
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1 point
The energy of the gamma-rays
The location of the gamma-rays
The shape of the gamma-ray source
Olivia Voyce talked in her video about using a material called TlBr (thallium bromide) to detect gamma-rays. What type of material is it?
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1 point
A semiconductor
A conductor
An insulator
Select what is needed to calculate the activity of a radioactive source by measuring the gamma rays emitted from it (there may be more than one correct answer):
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3 points
The number of gamma-rays detected
The length of measurement in seconds
The distance between the radioactive source and radiation detector
Required
Which of the following statements is correct?
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1 point
The intensity of a gamma-ray source decreases with the square of the distance from the source
The intensity of a gamma-ray source increases with the square of the distance from the source
The intensity of a gamma-ray source decreases linearly with the distance from the source
The gamma-rays emitted from an unstable nucleus are often described as which of the following:
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1 point
The gamma-rays are the DNA of the nucleus
The gamma-rays are the fingerprints of the nucleus
The gamma-rays are the heart of the nucleus
Select all the true statements from the following:
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6 points
Gamma-rays are a form of ionising radiation
Gamma-rays are electromagnetic radiation
Gamma-rays can be produced from natural sources on earth
Gamma-rays are charged
The path of a gamma-ray can be changed by using magnets
Gamma-rays can be used for diagnosing cancer
Gamma-rays can be used for treating cancer
Gamma-rays are very heavy
Gamma-rays can be produced in nuclear reactors
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