The Transmutation Functions for Some Cases of Deuteron-Induced Radioactivity

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Abstract
When nuclei are bombarded with deuterons, a commonly observed type of reaction is that resulting in proton emission and the conversion of the nuclei into isotopes of mass number one unit greater. Many such reactions give beta-radioactive products. The variation of the transmutation cross section with deuteron energy has been studied for the radioactivity thus produced in Na, Al, Si and Cu, with deuteron energies ranging from 0 to 3.6 MV. In all these cases it is found that the excitation curve is too flat to be explained by the Gamow theory, while it is fitted very well by a theoretical curve derived by Oppenheimer and Phillips. This is based on the idea that the nucleus can capture the neutron from the deuteron without requiring the penetration of the deuteron through the nuclear Coulomb barrier. The form of the theoretical curve depends on the binding energy of the deuteron; a value between 2.0 and 2.4 MV is required by the experimental results.

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