The 7Be, 22Na and 24Na production cross sections with 22-to 52-MeV proton on 27Al

Cross sections for the formations of 7 Be, 22 Na and 24 Na from proton bombardment of 27 Al were measured. A stack of aluminium foils was bombarded with 52 MeV protons. The reaction cross sections were calculated from the yields of the characteristic γ rays from the residual activities. Gamma rays were detected with a Ge(Li) detector. The cross sections for the 27 Al ( p , α d ) and ( p , α p n ) reactions near the thresholds were obtained and their absolute values were found to be explained in terms of evaporation process.