STUDY OF SOME 20Ne LEVELS BY RADIATIVE CAPTURE

Abstract
Four resonances in the reactions 16O(α, γ)20Ne and 4He(16O, γ)20Ne have been studied using gas targets of oxygen and helium. Resonances at 5.374, 6.930, and 7.940 MeV alpha-particle bombarding energy had been observed previously using the first reaction. In this experiment, an additional resonance was found at 5.075-MeV alpha-particle bombarding energy. This resonance level decays by a prominent cascade of gamma rays through the 4+, 4.25-MeV level in 20Ne and can be identified with a 6+, 8.79-MeV level in 20Ne observed previously in the 12C(12C, α)20Ne reaction. A comparison of the yield of the new resonance with one previously reported gives a value of ωγ = 1.8 ± 0.4 eV, which implies an E2 strength of 28 ± 6 Weisskopf units for the 6+ to 4+ transition.

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