ALPHA-PARTICLE BINDING-ENERGIES FOR REALISTIC NUCLEON-NUCLEON INTERACTIONS

The four-nucleon Yakubovsky equations are solved precisely for various realistic NN interactions. The resulting binding energies underbind t he alpha particle by about 1 to 5 MeV. The one-boson-exchange NN poten tials with smallest deuteron d-state probabilities provide the stronge st binding. Within the group of NN-force models used the 3N and 4N bin ding energies are strongly correlated. The probabilities to find two n ucleons at a distance r are compared to each other in the deuteron, th e triton, and the alpha particle.