  In the paper, we propose a new approach to the mathematical description of
the separation of a neutron from the atom's nucleus on the basis of the
formalisms of tropical mathematics and nonstandard analysis. In studying the
behavior of individual nucleons of the atom's nucleus, instead of the ordinary
approach involving the Einstein formula relating mass and energy, we use the
thermodynamical approach to the disintegration of the nucleus. This approach
allows to obtain a previously unknown general expression for the energy needed
to separate a neutron from its atom's nucleus, provided we know the de Broglie
wavelength and the volume of the nucleus.
