Production of p-rich nuclei with Z=20-25 based on radioactive ion beams

Within the framework of isospin-dependent Boltzmann-Langevin model, the production cross sections of proton-rich nuclei with Z = 20 - 25 are investigated. According to the reaction results for different isospin of projectiles Ni-48, Ni-49, and Ni-50, proton-rich fragments tend to be more easily produced in reactions with the proton-rich projectile Ni-48. The production cross sections of the unknown nuclei in the vicinity of the projectile are sensitive to incident energy. It is observed that incident energy of 345 MeV/u is appropriate for producing proton-rich nuclei with Z = 20 - 25. In projectile fragmentation reactions based on the radioactive ion beam of Ni-48 at 345 MeV/u, several unknown proton-rich nuclei near the proton drip line are generated in the simulations. All these new nuclei are near-projectile elements near Z = 28. The production cross sections of the new nuclei Ca-34, (SC)-S-37,38, Ti-38, V-40,V-41,V-42, Cr-40,Cr-41, and Mn-42,Mn-43,Mn-44,Mn-45 are in the range of 10(-2) - 10(2) mb. Hence, projectile fragmentation of radioactive ion beams of Ni is a potential method for generating new proton-rich nuclei with Z = 20 - 25.