Experimental and Theoretical Considerations for Ionization of Simple Hydrocarbons, H2, D2, O2, H2O, and the Rare Gases by 2.2‐MeV α Particles and by Electrons in a Mass Spectrometer

摘要: The measurement of ionization cross sections and mass spectra produced by 2.2‐MeV α particles is briefly discussed with emphasis on experimental details which lead to results are more accurate than those the previous study. Experimental techniques apparatus have been developed applied these measurements for H2, D2, O2, H2O, CH4, C2H2, C2H4, C2H6, rare gases. H2 He compared detailed calculations in Born—Bethe approximation Ar classical approximation. removal one electron conform rather well predictions although tend be somewhat lower, theoretical values. values He, Ar, N2 good agreement extrapolated data McDaniel co‐workers.The show same fragments as electrons velocity, but abundance some fragment ions dif...