title: Energy per ion pair measurements in pure helium and helium mixtures.
mesh_terms: D000512:Alpha Particles; D001128:Argon / Q000528:radiation effects; D006371:Helium / Q000528:radiation effects*; D009584:Nitrogen / Q000528:radiation effects; D011830:Radiation Effects; D014894:Weights and Measures
chemical_list: D006371:Helium; D001128:Argon; D009584:Nitrogen