The cross section for the photo-disintegration of the deuteron has been measured by detecting the photo-protons formed in a high pressure ionization chamber. The values obtained are 13.91 ± 1 × 10 -28 cm 2 for 2.62 MeV. γ-rays from radio-thorium and 15.6 ± 1 × 10 -28 cm 2 for the 2.76 MeV. γ-rays from radio-sodium.
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Collie et al. (1950) studied this question.
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