^(12)C(α,γ)^(16)O reaction at low energies

Citation

Kremer, Richard M. (1987) ^(12)C(α,γ)^(16)O reaction at low energies. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:08102010-092901686

Abstract

Absolute total cross-sections for ground state, ^(12)C(α,γ_O)^(16)O and cascade, ^(12)C(α,γ_C)^(16)O, 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 ^(16)O ions were separated from the intense ^(12)C 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.

Thesis Files