Lesson 02 of 812 min

Interaction of Atomic Nuclei with Particles

Subatomic particles can interact with atomic nuclei when they come within range of strong nuclear forces. Neutrons, protons or other particles can bounce off, excite the atomic nucleus, enter the nucleus or cause fission.

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Fission Chain Reaction

When a neutron splits the 235U nucleus, 2-3 neutrons are released. The fission chain reaction occurs when they split other nuclei, releasing more neutrons.

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Glossary

Neutron

Uncharged nucleon.

Cross-section

Probability measure for a nuclear reaction.

Fission

Splitting of a heavy nucleus.

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