Energieverteilung und Ausbeute der Photo-α-Teilchen aus Al,Ar, Se und Ag

The energy spectra of photoalpha particles from irradiations of natural Al, Ar, Se and Ag with 32.5 MeV bremsstrahlung were measured between 4 and 16 MeV using solid state detectors. Yield values in μb/MeV · ster were found to be 1.3; 3.0; 0.28; and 0.12 for Al, Ar, Se, and Ag, respectively. Simple compound nucleus calculations show qualitative agreement with the measurements.