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The photographic emulsion has been used to measure the differential cross section for the photo-disintegration of the deuteron by 6.1- and 7.0-Mev γ-rays, and by 14.8- and 17.6-Mev γ-rays. A new method for the absolute measurement of γ-ray intensities leads to an absolute value for the total cross section at 17.6 Mev of (7.2±{}1.5)×{}10^-28 cm². The results are in agreement with the theory for a "free" deuteron P-wave, but are not sufficiently accurate to fix with greater precision any of the parameters in the neutron-proton potential.
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P.V.C. Hough (1950) studied this question.
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