Production cross section of neutron-rich calcium isotopes in heavy ion collisions

Based on the isospin-dependent quantum molecular dynamics model along with the GEMINI model, heavy-ion collisions at intermediate energies are studied. We calculate the production cross sections of different fragments for reactions of ¹¹²Sn + ¹¹²Sn and ¹²⁴Sn + ¹²⁴Sn at different beam energies. The species and production cross sections of neutron-rich isotopes are generally dependent on the isospin of the system and the incident energies. The isotopes ⁴⁸Ca and ⁵⁴Ca are more productive for the neutron-rich system at 30 to 150 MeV/nucleon. (authors)