Range-Energy Relations for N, Na, and Ar Ions (0.3-2.0 MeV) in Ar,N2,O2, and Air

Ionization extrapolated ranges have been measured for N ions (0.3-2.0 MeV) in ${\mathrm{N}}_2$ and air, for Na ions (0.3-2.0 MeV) in air, and for Ar ions (0.3-1.0 MeV) in Ar, ${\mathrm{N}}_2$, ${\mathrm{O}}_2$, and air. A magnetically analyzed beam of ions was brought through a differential-pumping system into a gas stopping cell. A single-grid ionization chamber, movable along the beam axis, was used to obtain the data necessary to plot a Bragg curve. The observed range-energy relations are compared with previous data where possible. The accuracy of the measurements is ± 3%.