Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 408, Issue -, Pages 140-145Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2017.03.102
Keywords
Ion-atom collision; Multiple ionization; L-subshell x-ray production cross section
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Funding
- National Natural Science Foundation of China (NSFC - China) [11505248, 11375034, 11605147, 11375138, U1532263, 11275241, 11275238]
- Scientific Research Program - Shaanxi Provincial Education Department [15JK1793]
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L x rays of Nd have been measured for the bombardment of protons with the energies of 100-250 keV. It is found that L gamma 2 (abbreviation of L gamma'(2,3,4,4)) x-ray emission is largely enhanced by proton impact, compared to the case of photon radiation. It is proposed that is caused by the multiple-ionization of outer-shell electrons. To verify this explanation, the enhancement for relative intensity ratio of L iota and L beta(2) to L alpha x ray and the energy shift of various L-subshell x rays are discussed. In addition, the production cross sections of L iota, L alpha, L beta and L gamma x ray are obtained and compared with theoretical calculations of PWBA, ECPSSR and ECUSAR, along with various atomic parameter databases. (C) 2017 Elsevier B.V. All rights reserved.
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