Low Energy D+D Reactions in Metal
نویسنده
چکیده
D+D reactions in various metals were investigated for the deuteron bombardment with bombarding energies at around 150 keV and below 15 keV. Energetic protons andα-particles which can never be attained in the D+D reaction were observed in bombardments with higher energy deuterons. In order to explain the spectra, reaction processes in which three deuterons are involved are considered; sequential reaction and simultaneous three-body reaction. The sequential reaction can well explain the observed bump structure, and the three-body reaction can reproduce the continuum spectral shape of protons andα-particles, although an anomalously large enhancement factor is required. For the lower energy bombardment, thick target yields for the D+D reactions in Ti were measured down to 4.7 keV. They were well explained with the astrophysical S-factors deduced from gas target measurements. This indicates that the effect of the environment is not so much different for the deuterons in Ti and in gas phase.
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