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Be⁹ and B¹⁰ have been bombarded with alpha-particles from our electrostatic generator at energies up to 3.0 Mev and the gamma-radiation yield observed with scintillation counters. The data indicate energy levels in C¹³ at 11.95 and 12.46 Mev and in N¹⁴ at 12.77, 12.87, 12.90, 13.01, and 13.24 Mev. A number of higher energy levels were indicated in N¹⁴ but were not satisfactorily resolved.
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Talbott et al. (1953) studied this question.
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