Nuclear symmetry energy in charge and isotopic distributions

Isotopic yields of nitrogen and boron fragments from the decay of the single nucleus with A0 = 186, Z0 = 75 were studied on the basis of the statistical multifragmentation model, and compared with data from the MSU experiments for central collisions of 124Sn + 124Sn at E/A = 50 MeV. We have reconfirmed that a significant reduction of the symmetry term coefficient is necessary to reproduce the experimental isotopic distributions.