Lattice chiral EFT simulations predict that 22Si is bound against two-proton emission and that its protons and neutrons fill the Z=14 and N=8 shells.
Three-body forces and proton-rich nuclei
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abstract
We present the first study of three-nucleon (3N) forces for proton-rich nuclei along the N=8 and N=20 isotones. Our results for the ground-state energies and proton separation energies are in very good agreement with experiment where available, and with the empirical isobaric multiplet mass equation. We predict the spectra for all N=8 and N=20 isotones to the proton dripline, which agree well with experiment for 18Ne, 19Na, 20Mg and 42Ti. In all other cases, we provide first predictions based on nuclear forces. Our results are also very promising for studying isospin symmetry breaking in medium-mass nuclei based on chiral effective field theory.
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Lattice simulation of nucleon distribution and shell closure in the proton-rich nucleus $^{22}$Si
Lattice chiral EFT simulations predict that 22Si is bound against two-proton emission and that its protons and neutrons fill the Z=14 and N=8 shells.