Alpha-Induced Production Cross Sections of 77,79Kr and 77Br

The production cross sections of 77,79Kr and 77Br following the α-irradiation of natural selenium were determined between the α-energies of 11 MeV and 15 MeV using the activation technique. The irradiation of natural selenium targets with He2+ ions extracted from a cyclotron was conducted at Physikalisch-Technische Bundesanstalt in Braunschweig in Germany. The spectroscopic analysis of the reaction products was performed using a HPGe detector. As the α-beam was stopped inside the targets, the thick target yields were determined. The corresponding energy-dependent cross sections were calculated from the difference of the thick target yields at various beam energies. The determined values were compared to theoretical predictions based on the TALYS code.