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Nuclear and particle physics

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Question 8
a.

Two protons in a helium-3 nucleus are separated by a distance of about 1.0×10−15 m1.0 \times 10^{-15} \text{ m}1.0×10−15 m.

Describe the nature and range of the two main forces acting between these two protons.

[4]
b.

Here is some data for a nucleus of nitrogen-16 (716N^{16}_{7}\text{N}716​N) and a nucleus of radium-226 (88226Ra^{226}_{88}\text{Ra}88226​Ra).

Nitrogen-16 nucleusRadium-226 nucleus
Decay modeBeta-minus decayAlpha decay
Mass of nucleus / u16.0226.0
Radius of nucleus / 10−15 m10^{-15}\text{ m}10−15 m3.07.3

Use the data to:

  • describe the composition of the nuclei before and after the decay in terms of hadrons and quarks
  • show that both nuclei have approximately the same density.
[8]
Markscheme

Nuclear and particle physics Questions

  1. A Level
  2. /Physics
  3. /Nuclear and particle physics

90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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