We introduce the no-core full configuration (NCFC) approach and present results for $^4$He, $^{ 12}$C and $^{ 14}$F with the realistic NN interaction, JISP16. We obtain ground state energies and their uncertainties through exponential extrapolations that we demonstrate are reliable in $^4$He where fully converged results are obtained. We find $^{ 12}$C is overbound by 1.7 MeV and we predict the yet-to-be-measured binding energy of $^{ 14}$F to be $70.2\pm 3.5$ MeV. The extrapolated spectrum of $^{ 14}$F is in reasonable agreement with known features of the $^{ 14}$B spectrum.
Categories: nucl-th