Interactions between Some Two-Nucleon Configurations

The shell model wave functions may often be mixtures of those for two or more configurations. Calculations based upona a harmonic oscillator central potential with scalar Gaussian interactions between nucleons indicate that there is substantial interaction between various two-nucleon configurations of the 1d5/2, 2s1/2, 1d3/2 shell. The admixtures of the 1f7/2 subshell, which belongs to the next main level, are, however, small. A mixture of several neighboring configurations accounts for the ft value of F¹⁸(β⁺)O¹⁸ better than any single configuration.