Investigation of photodisintegration reactions forthe p-process reaction network

摘要

In the last years, a large number of photoneutron reactions in the astrophysically rele-vant energy window just above the neutron emission threshold has been studied in photoactivationexperiments at the superconducting Darmstadt electron linear accelerator S-DALINAC. The exper-imental results are discussed with regard to their astrophysical implications and compared with twostatistical model calculations. Complementary experiments on (p,y) and (a,y) reactions of astrophysical interest for the pprocess are planned for the next years at the Cologne TANDEM ion accelerator. We report ona first test experiment studying the proton capture reaction ~74Ge(p,y)~75As at energies within theastrophysically relevant Gamow window.