The stopping power of heavy ions for energies below 0.2Â MeV/nucleon measured by the semi-thick target method

A semi-thick target method has been used to measure the stopping power for recoils produced in the 120Sn(14N, 5n)129La, 120Sn(11B, 4n)127Cs and 118Sn(11B, 4n)125Cs reactions by γ-ray lineshape analysis. The target quality and thickness (1.2 mg/cm2) were determined by the Rutherford backscattering spectrometry technique. Electronic and nuclear stopping-power parameters were determined for Cs and La ions in Sn and compared with parameters measured with the same method for Pm, Sm and Nd ions in Cd and I ions in Ag. A comparison with the LSS theory was made for the energy range below 0.2 MeV/nucleon, where the Bethe-Bloch formula has no application.