Screening effect in the 6Li(p, 3He) 4He and 7Li(p, α) 4He fusion reactions for solid targets

✍ Scribed by Y. Boudouma; A.C. Chami; H. Beaumevieille

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 812 KB
• Volume: 617
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00396-5

✦ Synopsis

The electronic screening effect on the penetrability of the Coulomb barrier is evaluated for 6Li(p, 3He)ZHe and 7Li(p, a)4He fusion reactions through the so-called enhancement factor f. The fs experimental values of f for the two reactions involving solid targets are extracted from published cross sections. For the two inverse reactions involving gaseous targets fG values are also extracted. A model of interacting p and Li in a solid medium which predicts theoretical fs values is presented. Numerical evaluations of fs are made for the astrophysical energy range under numerous assumptions. Analytical two-parameter fits are derived. Values of the electron screening potential energy U 0 are evaluated and compared to those deduced from experimental data.