Electron-Impact Ionization of Atomic Ions in the Na isoelectronic sequence

PINDZOLA, M. S.; MITNIK, D. M.; SHAW, J. A.; GRIFFIN, D. C.; BADNELL, N. R.; SUMMERS, H. P.; SCHULTZ, D.R.

PHYSICA SCRIPTA

Año: 1998 vol. 57 p. 514 - 518

0281-1847

A database is assembled which contains electron-impact ionization rate coefficients for selected atomic ions in the Na isoelectronic sequence. The rate coefficients are obtained from a Maxwellian convolution of distorted-wave cross sections which include direct ionization of the 2p and 3s subshells, as well as inner-shell excitations from the 2s and 2p subshells leading to autoionization. These excitation-autoionization contributions can be large for many Na-like atomic ions. To assist modeling efforts of moderately dense plasmas, the rate coefficients are resolved as to the final state of the ionization process. A sample database file is presented for Fe15+. The complete database will reside in electronic form at the Controlled Fusion Atomic Data Center at ORNL (http://www-cfadc.phy.ornl.gov/data&24ITA