INTERACTION CROSS-SECTIONS AND RADII OF LIGHT-NUCLEI

The interaction cross sections (sigma(I)'s) with B-15, C-9, C-10, C-15 , N-13, O-13, O-14 and O-15 beams have been measured at energies of ar ound 730A . MeV. The effective root-mean-square (RMS) radii of the nuc leon distribution of these nuclei have been deduced using a Glauber-mo del calculation. The global isotope and isospin dependences of the rad ii are shown in the p-shell region, The sigma(I)'s are also compared w ith those obtained at intermediate energies in the region. Furthermore , we calculated the Coulomb-energy differences of the mirror pairs ded uced from the RMS charge radii and compared them with those obtained f rom the mass for some mirror pairs, From the above systematics, an ano malous nuclear structure (a halo and/or a skin) is suggested for B-14 and C-15, and the occurrence of an s-d inversion is emphasized for the Ne-17-N-17 mirror pair.