caa a22 4500 445865253 CHVBK 20180317145456.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1140/epjd/e2011-20173-5 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20173-5 Charge state effect on K-shell ionization of aluminum by 600-3400keV xenonq+ (12<q<29) ion collisions [Elektronische Daten] [Z. Song, Z. Yang, G. Xiao, Q. Xu, J. Chen, B. Yang, Z. Yang] K-shell X-ray spectra of Al were measured by the interaction of 600-3400keV Xe q+ (q=12-29)ions with Al surface. The X-ray yields per incident ion were deduced and the K-shell ionization cross-sections were obtained from the experimental yield data. With the same incident energy, the K-shell ionization cross-sections of Al excited by Xe q+(q<26)ions were of the same order of magnitude, while for q=26 and 29Xe ion collisions, they were, respectively, about two and ten times larger. Taking into account the binding-energy-modification and the recoil effect of target atoms, the binary encounter approximation (BEA) theory was consistent with the experimental data for q<26Xeion collisions, but it underestimated those excited by q=26 and 29 Xeions. This indicates that the K-shell ionization of target induced by Xe q+(q<26)ions was mainly due to the direct Coulomb excitation. However for q=26 and 29Xeions collisions, the transfer of 3d vacancies of projectile to the 1s orbital of target via rotational coupling of the 3dπ, δ-3dσ molecular orbitals, which were formed in the ion-atom quasi-molecule, may cause a considerable contribution to the enhancement of ionization. In addition to the well known Auger and X-ray transition, our experiments proved that the molecular orbital transition ("side-feeding”) mechanism is also a significant channel for de-excitation of hollow atoms formed below the surface. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Song Z. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Yang Z. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Xiao G. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Xu Q. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Chen J. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Yang B. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut Yang Z. College of Physics and Electronic Engineering, Northwest Normal University, 730000, Lanzhou, P.R. China aut The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 197-201 1434-6060 64:2-3<197 2011 64 10053 https://doi.org/10.1140/epjd/e2011-20173-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20173-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Song Z. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Yang Z. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Xiao G. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Xu Q. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Chen J. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Yang B. Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 700 1- Yang Z. College of Physics and Electronic Engineering, Northwest Normal University, 730000, Lanzhou, P.R. China aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 197-201 1434-6060 64:2-3<197 2011 64 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer