K shell x-ray production of eight elements from Ti to Ge by 14N-ion bombardment

The energy shifts of Ksub(β) x-rays and the Ksub(β)/Ksub(α) intensity ratios by 2.8 MeV N+ ion bombardments have been measured for eight elements from Ti to Ge. The Ksub(β)/Ksub(α) ratios are expressed as relative values to the ratios for 2 MeV proton impact. The experimental results indicate single K-plus multiple L-and M-shell ionisation, and strongly reflect the relative importance of M-shell vacancies in the Ksub(β)/Ksub(α) ratios at the time of K x-ray emission. These data are compared with the Hartree-Fock-Slater calculations and used to deduce information about the vacancy configurations of ionised atoms. The present results can be qualitatively explained within the framework of the direct Coulomb ionisation theory. (author)