Radioactive indium resulting from proton bombardment of indium exhibits negative electron emission which decays with a 4.1-hr. half-life. Proton bombardment of cadmium does not produce this activity. It is ascribed to a metastable excited state of In¹¹⁵ designated by In115* formed by a new type of proton excitation process. Control experiments exclude the possibility of its being formed by stray neutrons. The cross section for protons of 5.8 Mev is about 10^-29 cm².
No takes yet. Share an insight, caveat, or question.
Barnes et al. (1939) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: