Proton single-particle states in Na21,23 were studied through the (d,n) reaction on Ne20,22 at Ed=25 MeV. Angular distributions of the emitted neutrons leading to the final states up to Ex=15 MeV were measured. Spectroscopic information has been obtained from an analysis with the adiabatic deuteron breakup approximation, where s-wave deuteron breakup effects have been included. Proton unbound transitions were analyzed by means of Vincent and Fortunes method. It was found that the observed proton single-particle states in Na21,23 exhausted almost all the strength for the 2s1d shell. The distributions of the 2s1d strength were reasonably reproduced by recent 2s1d shell model calculations. The occupation probabilities and single-particle energies of the proton orbits near Fermi levels in the ground states of Ne20,22 were deduced in a framework of combined analysis of the stripping and pickup data on the same target nucleus.
ASJC Scopus subject areas
- Nuclear and High Energy Physics