Low energy nuclear astrophysical reactions

The results of calculations of the astrophysical S-factor(or the total cross sections) for the radiative capture 3He(α,γ)7Be reactions at extremely low energies carried out within new asymptotical method are presented. Nuclear vertex constants(NVC) for virtual decays 7Li →α + t and 7Be→3He + α are determined. It is shown that the method allows to do extrapolation for procedure for the S-factors to the range up to zero energy. it was shown that the experimental triple-differential cross section for 208Pb(6Li,αγ)208Pb Coulombbreakup can be used as an independent source of obtaining information about NVC for the virtual decay6Li →α + d and the astrophysical S-factor of the d(α,γ)6Li reactions at extremely low energy