The Energy Loss of Low Energy Protons in Some Gases

Experimental values for the energy loss of protons in ${\mathrm{H}}_2$, He, ${\mathrm{N}}_2$, ${\mathrm{O}}_2$, A, Kr, ${\mathrm{H}}_2$O, C${\mathrm{O}}_2$, and C${\mathrm{Cl}}_4$ have been obtained in the region from 10 to 80 kev. The energy loss ($\frac{\Delta E}{\Delta x}$) can be expressed for the elementary gases measured in terms of a single curve, with two constants $\frac{\Delta E}{\Delta x}=Lf\left(\mathrm{ME}\right)\mathrm{}$. The energy loss per atom is independent of the target density over the range 0 to 1.5-mm Hg, and the energy loss for compound gases is equal to the sum of their components.