Isospin equilibration in the reaction EA = 33, 45 MeV 40Ar, 40Ca + 58Fe, 58Ni☆

Abstract Isobaric beams from the K500 superconducting cyclotron have been used to study the effects the N Z of the target and projectile on the isobaric composition of emitted fragments for the reactions of E A = 33, 45 MeV 40 Ca, 40 Ar + 58 Fe, 58 Ni. At E A = 33 MeV , the system behaves as if it is equilibrated prior to the emission of reaction products, while at E A = 45 MeV the same composite system results in different isobaric ratios depending on the initial projectile and target; therefore, the emission of reaction products occurs prior to complete equilibration.