11B+α reaction rates and primordial nucleosynthesis

Details 11B+α reaction rates and primordial nucleosynthesis 11B+α reaction rates and primordial nucleosynthesis

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvc..43..883w&link_type=abstract

Physical Review C (Nuclear Physics), Volume 43, Issue 2, February 1991, pp.883-896

Physics

Nuclear Physics

19

6<=A<=19, Elementary Particle Processes

Scientific paper

Total cross sections and resonance yields have been measured for the 11B(α,n)14N reaction for Eα=350-2400 keV, and for the 14C(p,n)14N reaction for Ep=1000-1550 keV, using 4π neutron detectors. Differential cross sections for the 11B(α,p)14C reaction were measured for Eα=600-1820 keV. A strong and narrow (Γ=2.2 eV) new resonance was found at Eα=606 keV, with Jπ=7/2- established by (α,γ) and (α,p) angular distributions. This resonance dominates the thermonuclear (α,n) and (α,p) reaction rates for T~0.5×109 K. The 11B(α,n), (α,p), and (α,γ) reaction rates versus temperature are presented and compared with 11B(n,γ) rates.

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