Isospin mixing observed in the reaction 12C(6Li, α)14N |
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Authors: | J. Schwenzel K. Glasner P. Niermann E. Kuhlmann |
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Affiliation: | Institut fur Experimentalphysik I, Ruhr-Universität Bochum, 4630 Bochum, Federal Republic of Germany |
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Abstract: | The reaction 12C(12Li, α)14N was studied to investigate the isospin mixing of high-lying levels in 18F. Excitation functions and angular distributions of the α-transitions to the ground, first and second excited states in 14N were measured for bombarding energies from 3.2 to 8.0 MeV. The isospin-forbidden cross section for the excitation of the lowest T = 1 state in 14N at 2.31 MeV was found to lie between 1–2 % of that of the allowed transitions. A partial wave analysis of the α1 angular distribution data revealed a strong resonance with Jπ = 2+ at Ex = 15.99 MeV. Arguments are presented which tentatively identify this resonance as being due to two close-lying 2+ levels with different isospin. |
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Keywords: | Nuclear reactions |
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