Calculez et comparez les énergies de liaison nucléaire par...

Calculez et comparez les énergies de liaison nucléaire par nucléon, exprimées en $\mathrm{MeV}$, pour l'hydrogène-3 (tritium), l'hélium-4, le krypton-86 et l'uranium-235.
(Les données nécessaires se trouvent dans les Annexes C et E).

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Key Concepts

Binding Energy per Nucleon

This is the nuclear binding energy divided by the number of nucleons in the nucleus. It serves as a useful measure for comparing the stability of different nuclei; typically, nuclei with a higher binding energy per nucleon are more stable.

Einstein’s Mass-Energy Equivalence

This principle, expressed by the equation E=mc², allows the conversion of the mass defect into energy. It is fundamental in nuclear physics to relate the slight mass difference between bound nucleons and free nucleons to the binding energy of the nucleus.

Nuclear Binding Energy

This is the energy required to disassemble a nucleus into its individual protons and neutrons. It reflects the stability of the nucleus, as a higher binding energy means that more energy is needed to break apart the nucleus, indicating a more tightly bound system.

Mass Defect

The mass defect is the difference between the mass of a completely assembled nucleus and the sum of the masses of its individual nucleons. This missing mass has been converted into energy (via Einstein's relation E=mc²) during the formation of the nucleus, and it directly corresponds to the nuclear binding energy.

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