On the Photo-Disintegration of the Deuteron by Lithium and Fluorineγ-Rays

Abstract

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 $\gamma$-rays, and by 14.8- and 17.6-Mev $\gamma$-rays. A new method for the absolute measurement of $\gamma$-ray intensities leads to an absolute value for the total cross section at 17.6 Mev of (7.2±1.5)×${10}^{-28\mathrm{}}$ ${\mathrm{cm}}^2$. 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.