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 $Z=46-52\mathrm{}$ and $Z=74\mathrm{}$. The experimental results for tungsten can be interpreted to give a value of the nuclear radius equal to $(1.0\mathrm{}\pm 0.1)\times {10}^{-13\mathrm{}}{A}^{\frac{1}{3}}$ cm if a constant proton density is assumed for the nucleus. The radius of the tin nucleus is $(1.1\mathrm{}\pm 0.1)\times {10}^{-13\mathrm{}}{A}^{\frac{1}{3}}$ 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 $Z=48\mathrm{}$ gives a best fit to the lower $Z$ data.