Independent cross sections of alkali isotopes produced in various targets bombarded by 12C and 16O ions up to 77 MeV per nucleon

Preliminary investigation of the possibility of producing new isotopes, far from stability line, with heavy ion beams in the range of 20 to 100 MeV/nucleon is carried out. Isotopic distributions of Rb, Cs produced in the 12C+181Ta system and Rb produced in the 12C+93Nb, 16O+93Nb and 12C+238U systems are given. It is concluded that different processes occurring in the collisions are observed: peripheral collisions with weak mass and energy transfers and central collisions leading to fission and fragmentation of the target or projectile nuclei