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

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

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
Volume345
Issue number2
DOIs
Publication statusPublished - Jun 1993

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thermal energy
screening
augmentation
electrons
energy
fusion reactors
proton beams
astrophysics
fusion

Keywords

  • 25.40

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

The effects of electron screening and resonances in (p, α) reactions on10B and11B at thermal energies. / Angulo, C.; Engstler, S.; Raimann, G.; Rolfs, C.; Schulte, W. H.; Somorjai, E.

In: Zeitschrift für Physik A Hadrons and Nuclei, Vol. 345, No. 2, 06.1993, p. 231-242.

Research output: Contribution to journalArticle

Angulo, C. ; Engstler, S. ; Raimann, G. ; Rolfs, C. ; Schulte, W. H. ; Somorjai, E. / The effects of electron screening and resonances in (p, α) reactions on10B and11B at thermal energies. In: Zeitschrift für Physik A Hadrons and Nuclei. 1993 ; Vol. 345, No. 2. pp. 231-242.
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