Residual Strong Force & Nuclear Binding

This simulator builds a nucleus one composition at a time: choose a number of protons and neutrons, and watch them assemble under a real pairwise force law — a short-range Yukawa attraction standing in for the residual strong force (pion exchange between nucleons), a hard repulsive core that keeps nucleons from overlapping, and Coulomb repulsion between protons. The system is integrated as a genuine N-body relaxation every frame, so the resulting shape, binding energy and stability are outputs of the physics, not scripted. Push proton count high enough relative to the strong-force strength and Coulomb repulsion visibly wins, echoing why heavy real nuclei need extra neutrons — or eventually undergo fission or alpha decay — to stay bound.