Liquid drop model

In Nuclear physics, the liquid drop model is a model making it possible to roughly determine in only one general formula the distribution of the binding energies B according to the Mass number A.

The idea is to treat the nucleonic matter (nucleon = Neutron or Proton) of the core like a liquid. A little like water a drop rain, except that here the forces of Van der Waals between the Molécules of water are replaced by the strong nuclear interaction between the nucleons (" dilués" in the volume of the core).

One thus finds a term of volume (in A)

a term of surface (the nucleons on the surface are related than those to the center of the core)
a term of Coulomb repulsion of the protons between them
of the quantum terms of asymmetry and pairing

… and Ca goes (with the help of an optimized play of the coefficients used).

See too

Shell model Formula of Weizsäcker
nuclear Structure

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Liquid drop model

See too

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