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Upper widow in Fig.1 shows isotope yield ratio R_(21)(N,Z)for two center collisions~(60)Ca+~(60)Ca and ~(40)Ca+~(40)Ca as a function ofneutron number N with definite proton number Z lines at beamenergy E_(lab)= 50 MeV/nucleon within IQMD.Here there is thesame Z number on each Z-line.Under widow in Fig.1 in- dicates R_(21)(N,Z)as a function of proton number Z with definiteneutron number N lines.There is the
Upper widow in Fig.1 shows isotope yield ratio R_ (21) (N, Z) for two center collisions ~ (60) Ca + ~ (60) Ca and ~ (40) Ca + ~ (40) Ca as a function ofneutron number N with definite proton number Z lines at beamenergy E_ (lab) = 50 MeV / nucleon within IQMD.Here there is the same number Z number on each Z-line .Under widow in Fig.1-dicates R_ (21) (N, Z) as a function of proton number Z with definiteneutron number N lines.There is the