The Range Correction for Electron Pick-Up

The extension of positive particle ranges caused by pick-up of electrons at low velocities has been studied in Ilford C2 emulsion. Ranges of ${\mathrm{Li}}^8$ and ${\mathrm{B}}^8$ nuclei were measured in emulsion and compared with tracks of helium and hydrogen isotopes of the same velocity. The empirical range-energy relation adduced for light nuclei is: $\frac{Z^{2}R}{M}=F\left(\frac{T}{M}\right)+0.12\mathrm{}{Z}^3$, for $\beta >\frac{1.04Z}{137}$.