Measurement Of The S-Factor Of The T(H-1, Gamma)He-4 Reaction At Astrophysical Energies

The T(H-1, gamma)He-4 reaction has been studied for the first time in the energy range E-lab = 12-34 keV in the laboratory coordinate system (E = 7.8-20.1 keV in the center-of-mass system). The study of this reaction is of interest because it is involved in the primary nucleosynthesis of He-4 and is important for the theory of few-nucleon systems. The reported experiment improves the accuracy of the experimental determination of the S-factor of the T(H-1, gamma)He-4 reaction by several times. The theoretical calculations of the S-factor of the T(H-1, gamma)He-4 reaction still differ from the experimental values by a factor of about 2.