High-Energy Electron Scattering by Nuclei

Abstract

The Michigan race-track synchrotron has been used as a source of electrons for the study of elastic scattering of 30- to 45-Mev electrons by nuclei of $Z=46\ensuremath{-}52$ and $Z=74$. The experimental results for tungsten can be interpreted to give a value of the nuclear radius equal to $(1.0\ifmmode\pm\else\textpm\fi{}0.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}{A}^{\frac{1}{3}}$ cm if a constant proton density is assumed for the nucleus. The radius of the tin nucleus is $(1.1\ifmmode\pm\else\textpm\fi{}0.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}{A}^{\frac{1}{3}}$ cm. Any discontinuity in ${r}_{0}$ versus $A$ at the closing of the ${g}_{\frac{9}{2}}$ shell is about 1 percent or less; a step increase of 2 percent at $Z=48$ gives a best fit to the lower $Z$ data.