Phys.Rev. C 85, 044605 (2012)

C.W.Arnold, T.B.Clegg, C.Iliadis, H.J.Karwowski, G.C.Rich, J.R.Tompkins, C.R.Howell

Cross-section measurement of ⁹Be(γ, n)⁸Be and implications for α+α+n → ⁹Be in the r process

NUCLEAR REACTIONS ⁹Be(γ, n)⁸Be, E=1.5-5.2 MeV; measured neutron spectra, Eγ, σ(E) using HIγS facility at TUNL. ⁹Be; deduced resonance energies, neutron and gamma widths, B(E1), B(M1), neutron branching ratios. Deduced astrophysical reaction rate for ⁴He(αn, γ)⁹Be reaction for r-process nucleosynthesis sites. Comparison with previous studies using (γ, n) and (e, e') reactions.

doi: 10.1103/PhysRevC.85.044605