L-shell x-ray yields and production cross-sections of molybdenum induced by low-energy highly charged argon ions

Abstract

L-shell x-ray yields of molybdenum bombarded by highly charged Ar q+ ions (q = 11-16) are measured. The x-ray production cross-sections are extracted from the yields data. The energy of the incident Ar ions ranges from 200 to 350keV. After the binding energy correction, experimental data are explained in the framework of binary-encounter-approximation (BEA). The direct ionization is treated in the united atom (UA) limit (Lapicki and Lichten 1985 Phys. Rev. A 31 1354), not in the separate atom (SA) limit. The calculation results of BEA (Gacia and Fortner 1973 Rev. Mod. Phys. 45 111) are much lower than the experimental results, while the results of binding energy modified BEA are basically in agreement with the experimental results.

L-shell X-ray production of molybdenum and niobium induced by 1500–3500keV Xe26+ ions

“…4 and 5. The detail of this model will be discussed in the following.For slow collisions (v p 6 v e , v p is the projectile velocity; v e is the orbital velocity of the bound electron), using the modified BEA, the direct ionization of target atom has been interpreted successfully by several groups [16,17]. According to this model, the inner-shell ionization cross sections are given by [15] r I ðEÞ ¼ ðNz 2 r 0 =U 2 ÞGðVÞ ð 3Þ…”