Production of fastH0atoms by strippingH−ions in gas and vapor targets

Measurements of the total charge-changing cross sections ${\sigma }_{-0\mathrm{}}$ and ${\sigma }_{-+}$, are reported for ${\mathrm{H}}^{-}$ ions with energies in the range 30-200 keV incident on Ne, Ar, Kr, Xe, Li, Na, K, Rb, and Cs gas or vapor targets. Measurements of ${\sigma }_{g+}$ and ${\sigma }_{g-}$ are reported for fast ground-state ${\mathrm{H}}^0$ atoms with energies of 30-200 keV incident on the same targets. Measurements are also reported on the fractional yields as a function of the target thickness for ${\mathrm{H}}^{-}$ ions with energies in the range 30-200 keV incident on a variety of targets. The neutral fraction increases, reaches a maximum value, $F_0^{max}$, and then decreases to the equilibrium fraction $F_0^{\infty }$ as the target thickness increases from 0 to a very large value. Measurements of $F_0^{max}$, $F_0^{\infty }$, and $F_{-}^{\infty }$ are reported for ${\mathrm{H}}^{-}$ ions incident on a variety of targets.