Inhomogeneous isospin distribution in the reactions of Si-28+Sn-112 and Sn-124 at 30 and 50 MeV/nucleon - art. no. 041605

We have created quasiprojectiles of varying isospin via peripheral reaction s of Si-28 + Sn-112 and Sn-124 at 30 and 50 MeV/nucleon. The quasiprojectil es have been reconstructed from completely isotopically identified fragment s. The difference in N/Z of the reconstructed quasiprojectiles allows the i nvestigation of the disassembly as a function of the isospin of the fragmen ting system. The isobaric yield ratio H-3/He-3 depends strongly on N/Z rati o of quasiprojectiles. The dependences of mean fragment multiplicity and me an N/Z ratio of the fragments on N/Z ratio df the quasiprojectile are diffe rent for light charged particles and intermediate mass fragments. Observati on of a different N/Z ratio of light charged particles and intermediate mas s fragments is consistent with an inhomogeneous distribution of isospin in the fragmenting system.