¹²C(α,γ)¹⁶O Reaction at Low Energies

[摘要] Absolute total cross-sections for ground state, ¹²C(α,γ_O)¹⁶O and cascade, ¹²C(α,γ_C)¹⁶O, transitions were measured over the energy range 1.29 MeV to 3.29 MeV. γ-rays were detected with four large NaI(T1) crystals in close geometry around a ⁴He gas target. Recoil ¹⁶O ions were separated from the intense ¹²C beam and detected by a multiwire proportional and gas ionization chambers in time-of-flight delayed coincidence with the γ-rays. The total cross-section at the peak of the E_cm = 2.4 MeV, J^π = 1^- resonance was found to be 42.6 ± 3.6 nb and the extrapolated S-factor at 300 keV was determined to be 40⁺⁴⁰_-34 keV-barns.

[发布机构] University:California Institute of Technology;Department:Physics, Mathematics and Astronomy

[关键词] Physics