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A-LevelPhysicsParticle physics9702/12 · Feb/Mar 2019 · Q401 Mark

Which word equation represents β⁺ decay?

Aproton → neutron + electron + electron antineutrino

Bproton → neutron + electron + electron neutrino

Cproton → neutron + positron + electron antineutrino

Dproton → neutron + positron + electron neutrino

✓ Correct answer

D: proton → neutron + positron + electron neutrino

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About this question

Topic: Particle physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2019 Paper 1 Variant 2, question 40.

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