Here R and Q are its radius and charge, the first term is the kinetic energy of the fermi-gas, the second is the Coulomb energy, \ beta takes into account the charge distribution inside the NTS and the latest one gives the volume vacuum energy.
12.
Were it not for the Coulomb energy, the most stable form of nuclear matter would have the same number of neutrons as protons, since unequal numbers of neutrons and protons imply filling higher energy levels for one type of particle, while leaving lower energy levels vacant for the other type.
