Original Research

Journal of Fusion Energy

, Volume 31, Issue 4, pp 357-367

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

The 11B(p,α)8Be → α + α and the 11B(α,α)11B Reactions at Energies Below 5.4 MeV

  • M. C. SprakerAffiliated withNorth Georgia College and State University Email author 
  • , M. W. AhmedAffiliated withDuke University and TUNLNorth Carolina Central University
  • , M. A. BlackstonAffiliated withDuke University and TUNLOak Ridge National Laboratory
  • , N. BrownAffiliated withDuke University and TUNL
  • , R. H. FranceIIIAffiliated withGeorgia College and State University
  • , S. S. HenshawAffiliated withDuke University and TUNL
  • , B. A. PerdueAffiliated withDuke University and TUNLLos Alamos National Laboratory
  • , R. M. PriorAffiliated withNorth Georgia College and State University
  • , P.-N. SeoAffiliated withUniversity of Virginia and TUNL
    • , S. StaveAffiliated withDuke University and TUNLPacific Northwest National Laboratory
    • , H. R. WellerAffiliated withDuke University and TUNL


Measurements of the absolute cross section and angular distributions for the \(^{11} \hbox{B}(p,\alpha)^{8}{\text{Be}}\rightarrow\alpha+\alpha\) and the 11B(α,α)11B reactions have been performed from 0.15 to 3.8 MeV for the 11B(p,α) study and from 2 to 5.4 MeV for the 11B(α,α) reaction. The absolute cross sections are presented in terms of the total number of α-particles detected in order to avoid uncertainties due to ambiguities in the number of alpha particles emitted in the reaction at a particular energy. The angular distributions of the 11B(p,α)8Be(2+) reaction were fit to a Legendre polynomial expansion and the coefficients are presented. Finally, the 11B(α,α)11B data were fit in terms of phase shifts (ignoring the spin of the target), providing a convenient representation of the elastic cross section data between 2 and 5.4 MeV.


Low energy nuclear physics Aneutronic fusion Fusion Triple alpha Energy production 11B Alpha Proton fusion Alpha elastic scattering Cross section Angular distribution