Abstract
The angular distribution of neutrons arising from the photo-disintegration of deuterons by gamma-rays of 2.76 Mev energy has been investigated under conditions requiring no corrections for neutron scattering by the walls or by the heavy water. Inverse square law tests using balloon suspension indicated the clearance required for which the apparatus was free of the effects of scattering. The weighted ratio of the photomagnetic to the photoelectric cross sections was found to be 0.295±0.036.

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