Abstract
This chapter focuses on Coulomb energy of 3 He. The AGS quasiparticle method provides a way to include the Coulomb interaction in the three-nucleon system, especially, as demonstrated by Alessandrini and Zankel, if only two charged nucleons are present in the three-body system. The method takes into account the Coulomb force exactly, and so the usual Coulomb singularity problem arises. As there is still no manageable exact treatment of the Coulomb many-body system available, the Coulomb singularity is circumvented by using a Yukawa type cutoff. Considering the small internucleon distances in the three-nucleon bound state, it seems to be plausible that the long-range Coulomb singularity rather weakly influences the three-nucleon binding energy. Switching off all Coulomb contributions in the 3 He, assuming charge symmetry of the nuclear forces, a model is obtained for the triton. The binding energy difference of 3 H and 3 He is then the Coulomb energy ( E C ) of He. The chapter illustrates the effective potential of 3 He.
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