Variation of heavy-ion-induced x-ray emission with the chemical state of the target

The paper examines the variation of heavy-ion induced x-ray emission with the chemical state of the target. A multiply ionized Si atom is modelled in different chemical surroundings and account is taken of electron relaxation and cascading de-excitation effects. Intensity distributions in x-ray satellite spectra were examined with respect to: i) electronic structure of Si compounds, ii) environmental effects on the cascading de-excitation, and iii) projectile modification in solid targets. The results indicate that the chemical surroundings have a great effect on the cascading de-excitation of highly excited atom states carrying vacancies. Also due consideration must be given to the projectile charge state, which is altered prior to the multiply ionising collision by the available electrons of the target. (U.K.)