Thin targets of sodium, aluminum, and manganese were bombarded with 3.0-Mev deuterons from the large electrostatic generator at the Department of Terrestrial Magnetism, and the protons were observed at 90 degrees to the beam with an argon filled proportional counter. The counter was biased to count protons at the end of their range and the ranges of the groups were measured in air and aluminum. Proton groups due to oxygen and carbon were found with all targets.
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Whitehead et al. (1950) studied this question.
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