Electron Transfer fromO−to the3pLevel ofNa+in 0- to 7-eV Collisions

Abstract

We have determined the cross section for the process ${\mathrm{Na}}^{+}+{\mathrm{O}}^{-}\to \mathrm{Na}\mathrm{}\left(3p\right)+\mathrm{O}$ as a function of relative kinetic energy in the range 0.06-7 eV. The measurements were achieved by monitoring the intensity of the $\mathrm{N}\mathrm{a}-D$ doublet at 5890 Å emitted from the collision region of a merged-ion-beam device. The cross section is extremely large, ${10}^{-12\mathrm{}}$-${10}^{-11\mathrm{}}$ ${\mathrm{cm}}^2$, and shows at least one sharp peak, at 2.75 eV.