The cross section for photoexcitation of In¹¹⁵ᵐ has been measured between 1 and 14 Mev. The cross section is found to rise to a narrow peak at 8 Mev, 2 Mev wide, of maximum value 1.2 mb. This peak is interpreted as the result of competition from neutron emission by the excited nucleus. Clear evidence for sharp levels in the excitation cross section is found below 2 Mev and the integrated cross sections for two levels are determined approximately.
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Burkhardt et al. (1955) studied this question.
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