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X-ray emission of Xe30+ ion beam impacting on Au target

Published online by Cambridge University Press:  02 June 2011

Xiaoan Zhang
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China Ion beam & Optical Physical joint Laboratory of Xianyang Normal University and Institute of Modern Physics, Chinese Academy of Sciences, Xianyang, China
Yongtao Zhao*
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China Ion beam & Optical Physical joint Laboratory of Xianyang Normal University and Institute of Modern Physics, Chinese Academy of Sciences, Xianyang, China
Dieter H.H. Hoffmann
Affiliation:
Ion beam & Optical Physical joint Laboratory of Xianyang Normal University and Institute of Modern Physics, Chinese Academy of Sciences, Xianyang, China Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
Zhihu Yang
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Ximeng Chen
Affiliation:
School of Nuclear Science and Technology, Lanzhou University, Lanzhou, China
Zhongfeng Xu
Affiliation:
Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China
Fuli Li
Affiliation:
Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China
Guoqing Xiao
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
*
Address correspondence and reprint requests to: Yongtao Zhao, Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China. E-mail: zhaoyt@impcas.ac.cn

Abstract

X-ray emission from Xe30+ ions at 350–600 keV impacting on an Au target was investigated at the Heavy Ion Research Facility at Lanzhou. Characteristic X-rays of Xe ions at energy of about 1.65 keV were observed. This X-ray emission is induced by the decay of very high Rydberg states of Xe ions. It was also found that the yield of such characteristic X-rays is decreasing with increasing the projectile kinetic energy. Simultaneously, the yield of the characteristic Au X-rays from the M shell increases also. These phenomena are qualitatively analyzed with the classical Coulomb over the Barrier Mode (COBM) for highly charged ions interacting with solid state surfaces.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2011

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