RMF calculation and phenomenological formulas for the rms radii of light nuclei

The RMF (Relativistic Mean Field) calculations are performed systematically for light isotopes (A < 40) with NL-SH parameter set. The calculated bindi ng energies and root mean square (rms) radii of light nuclei are discussed. On the basis of the theoretical calculations and the experimental data, we have suggested a group of phenomenological formulas for the neutron, proto n and matter rms radii for nuclei with A < 40, including the drip-line nucl ei. In these formulas, the effects of binding energies, isospin and separat ion energies are considered. These formulas not only agree to the experimen tal data for stable nuclei well, but also reproduce the abnormal large radi i of nuclei near the drip-line that the previous empirical models fail to r eproduce them. (C) 2001 Published by Elsevier Science B.V.