Interaction of fast H1 + ions with metal surfaces in very high vacuum

The results of experiments on the interaction of fast hydrogen ions (H₁ ⁺) with metals forming weak chemical bonds (nickel, stainless steel) and metals forming strong chemical bonds (tantalum and titanium) with hydrogen are presented. The weighing method was used under very-high vacuum conditions to determine the sputtering coefficient of stainless steel bombarded by 35-keV H ₁ ⁺ ions and the penetration coefficient of H ₁ ⁺ ions entering the stainless steel (=9.10^–3, =0.5 for hydrogen concentrations greatly exceeding 10¹⁹ atoms/cm²). The variation of with the density of the hydrogen introduced and the temperature of the metals was determined by the pressure-variation method. The results indicate that metals of the titanium type are suitable for use in capturing fast hydrogen atoms in magnetic traps.Translated from Atomnaya Énergiya, Vol. 21, No. 5, pp. 339–345, November, 1966.