IB Physics Sub-topic E4 Definitions

This page contains our IB Physics definitions for sub-topic E4. By learning each one of these definitions, you will fully cover the content for IB Physics 'Fission'.
Conditioning

The final step in nuclear waste management, involving encapsulating or solidifying waste in materials like cement, bitumen, or glass, and storing it in corrosion-resistant containers

Control Rods

Retractable rods that absorb neutrons to control the rate of the nuclear chain reaction

Fission

It is the splitting of a large nucleus into two smaller nuclei, releasing energy

Fusion

It is the joining of two nuclei to form a larger nucleus, releasing energy

Half-life

It is the amount of time for half of the atoms to decay

Moderator

A material within the reactor that slows down neutrons to optimize their speed for successful nuclear reactions

Neutron Bombardment

The process of bombarding fuel rods with neutrons to initiate a fission reaction

Radioactive decay

It is the process of decomposition of unstable nuclei into lighter nuclei and emission of radiation

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