The astrophysical S-factor for dd-reactions at keV-energy range

The experimental results of measurements of the astrophysical S-factor for dd-reaction at keV-energy range collision energies using liner plasma technique are presented. The experiments were carried out at the high current generator of the Institute of High-Current Electronics in Tomsk, Russia. The measured values of the S-factors for the deuteron collision energies 1.80, 2.06 and 227 keV are S dd = (114 ± 68), (64 ± 30), (53 ± 16) b-keV, respectively. The corresponding cross sections for dd-reactions, described as a product of the barrier factor and measured astrophysical S-factor, are σ n dd (E col = 1.80 keV) = (4.3 ± 2.6) 10 -33 cm 2 ; σ n dd (E col = 2.06 keV) = (9.8 ± 4.6)-10 -33 cm 2 ; σ n dd (E col = 2.27 keV) = (2.1 ± 0.6)-10 -32 cm 2 .