CLUSTER MODEL FOR THE MASS-22 T = 1 TRIPLET NUCLEI

A cluster model for the mass-22 T = 1 nuclei is presented using the id eas of the Buck-Dover-Vary model. The three T = 1 nuclei: Ne-22, Na-22 and Mg-22, are described as composites of the mass-10 T = 1 isobaric nuclei: Be-10, B-10 and C-10, respectively, orbiting a C-12 subnucleus . In each of the nuclei, the clusters retain their free-space properti es and can be excited from the 0+ to the 2+ excited state. It is shown that these basis states are sufficient to describe the spectra and el ectromagnetic properties of the nuclei. The T = 0 spectrum of Na-22 is also described as B-10 orbiting the C-12 core. The spectrum arises wh en C-12 is in its 0+ ground state while B-10 occupies either of its lo w-lying T = 0 states: 3+ ground state, 1+ state at 0.718 MeV or 1+ sta te at 2.158 MeV. Using these basis states the T = 0 spectrum, the grou nd-state root-mean-square charge radius, the static moments and electr omagnetic transition strengths of Na-22 were calculated, and shown to be consistent with experiment.