Simultaneous L- and M-shell ionization of a Se-80 target deduced from the analysis of energy shifts and relative intensities of K x-ray lines inducedby various projectiles

Average energy shifts of K alpha and K beta x-ray satellite lines and K bet a/K alpha intensity ratios have bean experimentally evaluated for a Se-80 t arget bombarded by various projectiles with atomic numbers in the region 3 less than or equal to Z(p) less than or equal to 16 at a given projectile e nergy of 3.3 MeV/u. The data have been analysed using an approach, based on the results of extensive single-configuration Dirac-Fock (DF) calculations , performed within the multiconfiguration DF method for various distributio ns of holes in subshells of a Se-80 ion. This provides information about th e average number of holes in various subshells of Se-80 ions at the time of emission of the K x-ray lines. The primary average number of L- and M-shel l holes in a Se-80 target produced at the moment of collisions with project iles and the average ionization probabilities per electron for L and M shel ls have been deduced by means of a simple statistical scaling procedure whi ch accounts for all processes that modify the number of L- and M-shell hole s prior to the K x-ray emission. It has been found that the average ionizat ion probabilities per electron for L and M shells increase considerably wit h Z(p)(2). For larger Z(p) the average ionization probability per electron is significantly higher for M shells than for L shells. On the other hand, for small Z(p) the ionization probability per electron seems to be slightly higher for L shells than for M shells, Moreover, the dominant role of the simultaneous multiple ionization of L and M shells accompanying the ionizat ion of a K shell has been observed for projectiles with Z(p) > 3.