The classical-trajectory Monte Carlo method has been used to determine product-state distributions in $A^{q+}+\mathrm{H}\to A^{\mathrm{}(q-1\mathrm{})+}\mathrm{}\left(\mathrm{nl}\right)+{\mathrm{H}}^{+}$ electron-capture collisions at energies 50 and 100 keV/amu for fully stripped ions in charge states $q=1\mathrm{} \mathrm{to} 20$. In the energy region studied, the electron-capture products are found to populate predominately principal quantum numbers around $n_m\approx q^{\frac{3}{4}}$. Such behavior implies the captured electron tries to preserve both its original orbital energy and dimensions after the electron-capture collision. The orbital-angular-momentum quantum numbers $l$ are more highly peaked than statistical to large $l$ values for $n<\mathrm{}{n}_m$, while they are found to maximize around $l\approx q^{\frac{3}{4}}$ for $n>\mathrm{}{n}_m$.

• Received 9 March 1981

DOI:https://doi.org/10.1103/PhysRevA.24.1726