A-LevelPhysicsNuclear physics9702/12 · May/June 2016 · Q401 Mark

Which equation represents β⁺ decay?

Aneutron → proton + positron + antineutrino

Bneutron → proton + positron + neutrino

Cproton → neutron + positron + antineutrino

Dproton → neutron + positron + neutrino

✓ Correct answer

D: proton → neutron + positron + neutrino

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2016 Paper 1 Variant 2, question 40.

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