LOW-ENERGY CROSS-SECTIONS FOR B-11 (p, 3 alpha)

Davidson, J.M.; Berg, H.L.; Lowry, M.M.; Dwarakanath, M.R.; Sierk, A.J.; Batay-Csorba, P.

doi:10.1016/0375-9474(79)90647-X

LOW-ENERGY CROSS-SECTIONS FOR B-11 (p, 3 alpha)

Oct, 1978

16 pages

Published in:

Nucl.Phys.A 315 (1979) 253-268

Published: 1979

DOI:

10.1016/0375-9474(79)90647-X

Report number:

LAP-165

View in:

Nuclear Science References

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Abstract: (Elsevier)

The cross section for the 11 B(p, 3α) reaction has been measured for lab bombarding energies from 35.4 keV to 1500 keV. The astrophysical S -factor is calculated for this range of energies and an empirical fit to S is presented. The reaction rate 〈σν〉 is calculated for temperatures up to T = 500 keV/ k = 5.5 × 10 9 K. For the resonance at 163 keV [ 12 C ∗ (16.11 MeV)], the resonance cross section and width were measured to be σ R = 54 ± 6 mb and Γ c.m. = 5.2 ± 0.5 keV , differing somewhat from values reported in previous studies. The measured cross sections from the present work lead to the values of 〈σν〉 which are somewhat lower than those quoted previously, offering a less optimistic prospect for 11 B+p as an advanced fusion fuel than previously envisioned.