Single and doubleKvacancies of fluorine ions moving in carbon at2<~vv0<~9

Single and double $K$-vacancy fractions have been extracted from measured charge-state distributions (CSD) for F ions moving in solid C in the velocity range $4<~\frac{v}{v_0}<~9$. The CSD's are analyzed in terms of separate $K$-shell and $L$-shell distributions. The importance of the shifts in the $L$-shell distribution for 0, 1, or 2 $K$ electrons is demonstrated. The results are consistent with previous x-ray results, measured in the velocity range $2<~\frac{v}{v_0}<~9$.