Constraints on the appearance of a maximum in astrophysical S-factor

Abstract

For fusion reactions of astrophysical interest, the existence of a maximum of S-factor is revealed within the extended quantum diffusion approach. The available experimental data are well described. The reason and consequences of the existence of the S-factor maximum are explained. An universal formula for the position of the maximum is proposed.

Keywords

• Astrophysical S-factor
• Deep sub-barrier fusion (capture)
• Dissipative dynamics