IB Physics HL E 3 14 Hl Evidence for Strong Force Questions
Use HL scattering and nuclear-stability evidence to explain the short range and attractive role of the strong nuclear force.
- Syllabus
- First assessment 2025
- Course
- Physics HL
- Level
- HL
Exam points
- explain why the comparable range of pion exchange and nucleon separation supports a short-range mediator for the strong nuclear force
- use proton repulsion, nuclear stability and deviations from Rutherford scattering as evidence for an attractive strong force
- interpret stable-nuclide or high-energy-scattering evidence to identify the range and effects of the strong interaction
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IB Physics HL E 3 14 Hl Evidence for Strong Force Questions question 1
[Maximum number: 2]
A short-range attractive force operates between nucleons.
State and explain one piece of evidence that suggests the presence of this force.
ALTERNATIVE 1
Protons repel each other so no nuclei could form
Unless an attractive force exists to overcome this repulsion
ALTERNATIVE 2
Deviation from Rutherford scattering / drop off of scattering at high energies (≥28MeV)
This is due to strong nuclear force acting on alpha particle
ALTERNATIVE 3
The binding energy per nucleon is mostly constant above a certain point (A~60)
this is the consequence of an attractive <<short range>> force
ALTERNATIVE 4
Most nuclei have large binding energies
Indicating that a strong force keeps nucleons together
MP1 is required to award MP2
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