Electron Screening Effect in Nuclear Reactions in Metallic and Gaseous Targets

The electron screening effect and its influence on enhanced H-2(d,p)H-3 reaction cross section was investigated based on latest metallic (Zr) target data, as well as much older gaseous target data. The enhancement can result not only from the electron screening effect but also from a suggested 0(+) resonance state in the He-4 compound nucleus. This resonance state allows to explain the experimental enhancement factor energy dependence.