THE EFFECT OF INNER-SHELL EXCITATION ON K-ALPHA EMISSION FROM ALUMINUM IONS

Pie have calculated spectra due to K alpha line emission from aluminum Li-, Be-, B-, C-, N-, O- and F-like ions. The following atomic proces ses have been taken into account to model the population distribution of the upper levels of these transitions: dielectronic recombination, and inner-shell collisional excitation and deexcitation. From these pr ocesses, inner-shell excitation is the dominant populating process. Pi e illustrate this result by calculating and displaying the K alpha emi ssion spectra of B- and C-like Al produced under different conditions. These results are relevant for the interpretation of K alpha emission spectra generated by plasmas with hot electrons.