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

Abstract A semi-thick target method has been used to measure the stopping power for recoils produced in the 120 Sn( 14 N, 5n) 129 La, 120 Sn( 11 B, 4n) 127 Cs and 118 Sn( 11 B, 4n) 125 Cs reactions by γ-ray lineshape analysis. The target quality and thickness (1.2 mg/cm 2 ) 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.