A Monte-Carlo technique is used to calculate vacancy cascades in neutr
al xenon atoms and in q-fold ionized Xeq+ ions (0 less than or equal t
o q less than or equal to 50) in the energy ground state with one addi
tional K vacancy. Probabilities P(k) that the remaining ion is k-fold
ionized after the deexcitation of a primary K-shell vacancy are calcul
ated. The dependence of the actual P(k) values on the atomic structure
is discussed. (C) 1997 Elsevier Science Ltd.