Abstract
A measurement has been made of the internal pair-creation coefficient, of the 2·76 MeV. gamma-ray line from Na24. This is found to lie very close to the curve of electric dipole transitions predicted by Jaeger and Hulme for Z=0 and suggests that measurement of this coefficient for high energy transitions in light nuclei may provide a useful method of determining multipole order. On the assumption that the 2·76 MeV. line is of dipole origin, an energy level diagram has been constructed for the Mg24 nucleus.

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