Isotopic production cross sections of fragmentation residues produced by 18O ions on a carbon target near 260 MeV/nucleon* *Supported in part by the National Natural Science Foundation of China (11905260, 12005314), the Western Light Project of Chinese Academy of Sciences, the Heavy Ion Research Facility in Lanzhou (HIRFL), and the open research project of CAS large research infrastructures

Abstract

The isotopic cross sections of residual nuclei produced in fragmentation reactions of 18O projectiles impinging on a carbon target at energies near 260 MeV/nucleon were measured at the HIRFL facility in Lanzhou (China). A full identification of atomic and mass numbers of fragments was achieved from the determination of their magnetic rigidity, energy loss, and time of flight. The production cross sections for a dozen of nitrogen, carbon, and boron isotopes were determined with uncertainties below 30% for most of the cases. The obtained cross sections for N and B isotopes show a rather good agreement with previous experimental data obtained with different projectile energies. The cross sections for some C isotopes seem to exhibit a dependence on the projectile energy. A comparison of the data and several theoretical model calculations are presented.