Calculation of the3He(3He,2p)4He and3H(3H,2n)4He astrophysical S factor at low energies

Abstract
The authors have calculated the cross sections for the charge symmetric reactions 3He(3He,2p)4He and 3He(3He,2p)4He at sub-Coulomb energies in the potential model. Good agreement with the experimental data is obtained. The astrophysical S factors in the thermonuclear energy range are calculated.