DETAILED STUDY OF THE CLUSTER STRUCTURE OF LIGHT-NUCLEI IN A 3-BODY MODEL (.4.) LARGE SPACE CALCULATION FOR A = 6 NUCLEI WITH REALISTIC NUCLEAR-FORCES

The structure of all low-lying states for the A = 6 nuclei (He-6, Li-6 , Be-6) is described in detail in terms of a realistic three-body alph a + 2N model using the full Reid soft-core NN potential (RSC), the acc urate Nalpha interaction potential with odd-even splitting in central and spin-orbital components and the exact RGM Pauli projectors onto fo rbidden 0s-states in five-nucleon subsystems. The model thus includes all necessary types of forces: central, spin-orbital, tensor, Coulomb and partial exchange. The new refined version of the model gives a goo d agreement with experiment without any free parameters for all static characteristics of A = 6 nuclei (except for the Li-6 quadrupole momen t), for the Li-6 electromagnetic form factors, for the Coulomb displac ements of the 0+1 and 2+1 levels of three He-6, Li-6, Be-6 nuclei, for the He-6 beta-decay probability and for the gamma-widths of the Li-6 excited states. An analysis of the geometric shapes of low-lying state s of He-6, Li-6, Be-6 nuclei is given.