The FDS (Fermion Dynamical Symmetry) Model, Nuclear Shell Model and Collective Nuclear Structure Physics*

摘要: We often hear nowadays that the “fundamental theory of strong interaction physics is QCD”. All models and theories in field are motivated by it. Nevertheless, due to enormous complexities QCD, one still awaits its precise usage practical calculations. In nuclear structure physics, there a parallel dilemma. The fundamental shell model. Let me be about this. By term model, I mean diagonalization hamiltonian with certain residual “effective” Interactions truncated many body basis which Is constructed from spherical single particle orbits within, say, major physical shell. This physics’ utopia. Unfortunately, while model has proven extremely useful for studying properties nuclei near closed shells, general practice systems large number valence nucleons been challenge arena last thirty years. order use study such where very “rich physics” presides, further drastic truncation space must. Therefore, how truncate fermion perhaps central question. this talk, hope convince you that, through twists turns, idea dynamical symmetry played pivotal role entire effort we may now have glimpse as can achieved. at verge entering new stage able reconcile on hand collective with, other