But are the nuclei of atoms really round? Intuitively this shape makes sense and physicists believed it aptly explained early ...

The atomic nucleus is composed of protons ... learning algorithms to study the evolution of shell structure. "In this study, we considered many features of atomic nuclei and achieved high ...

Hans D. Jensen develop a theory of the nucleus as composed of shells of protons and neutrons. It explains why nuclei with certain “magic numbers” of protons and neutrons are more stable.