REACTION CROSS-SECTIONS AND RADII FOR F-P SHELL EXOTIC NEUTRON-RICH NUCLEI

Reaction cross sections have been measured at energies ranging from 50 to 70 MeV/nucleon for a variety of exotic neutron rich isotopes of Ar , K, Ca, and Sc. A method where Si detectors are used also as targets has been utilized for the measurements. The strong absorption radii r( 0)(2) have been determined and compared to the results of Glauber-type calculations which used density distributions extracted from the rela tivistic mean field theory. The isospin dependence of the radii was in vestigated and a trend similar to the one for lighter nuclei has been observed. The possible existence of halo or skin nuclei has also been addressed.