The effects of electron screening and resonances in (p, α) reactions on10B and11B at thermal energies

C. Angulo, S. Engstler, G. Raimann, C. Rolfs, W. H. Schulte, E. Somorjai

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The fusion reactions10B(p, α)7Be and11B(p, α)8Be have been studied over the c.m. energy range E=17 to 134 keV using intense proton beams and thick solid targets. In the case of11B(p, α)8Be the low-energy data in terms of the astrophysical S(E) factor show an exponential enhancement (up to a factor of 1.9) due to the effects of electron screening, where the deduced screening potential is larger than expected. In the case of10B(p, α)7Be the low-energy data exhibit an enhancement by more than a factor of 200, which cannot be explained by the effects of electron screening. The enhancement arises here from the high-energy tail of an expected s-wave resonance at ER=10 keV. The results offer an improved prospect for this reaction as advanced fuel in future fusion reactors than previously envisioned.

Original languageEnglish
Pages (from-to)231-242
Number of pages12
JournalZeitschrift für Physik A Hadrons and Nuclei
Issue number2
Publication statusPublished - Jun 1 1993



  • 25.40

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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