¹²C(α,γ)¹⁶O Reaction at Low Energies

Citation

Kremer, Richard M. (1987) ¹²C(α,γ)¹⁶O Reaction at Low Energies. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/95z5-9c26. https://resolver.caltech.edu/CaltechTHESIS:08102010-092901686

Abstract

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.

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