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Chin. Phys. B, 2015, Vol. 24(3): 033403    DOI: 10.1088/1674-1056/24/3/033403
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Fast-electron-impact ionization process by 3p of hydrogen-like ions in Debye plasmas

Qi Yue-Ying (祁月盈)a, Ye Dan-Dan (叶丹丹)a, Wang Jian-Guo (王建国)b, Qu Yi-Zhi (屈一至)c
a School of Mathematical & Physics and Information Engineering, Jiaxing University, Jiaxing 314001, China;
b Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
c College of Material Sciences and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract  The plasma screening of fast-electron-impact-ionization by excited state (3p) of Hydrogen-like ions was investigated in the first Born approximation with a plasma screening length δ varying from 1000a0 to 10a0. The generalized oscillator strength densities showed dramatic changes: some accessional minima occurred along with a remarkable enhancement in certain continuum-energy domains. The double-differential cross sections exhibit not only the same structures as the Bethe surface for moderate and large momentum transfers, but also a broadened enhancement for small momentum transfers. The single-differential cross sections exhibit a near-zero-energy-enhancement and prodigious multiple-shape resonances, depending on the continuum energy and the plasma screening length. These features are analogous to those of the photo-ionization cross section. These findings, for both types of cross section, can be explained by processes associated with continuum electrons, as long as the potential has a short-range character.
Keywords:  near-zero-energy enhancement      multiple shape resonance      differential cross section      Bethe surface  
Received:  09 July 2014      Revised:  31 October 2014      Accepted manuscript online: 
PACS:  34.80.Dp (Atomic excitation and ionization)  
  52.20.-j (Elementary processes in plasmas)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB922200) and the National Natural Science Foundation of China (Grant Nos. 11005049, 11025417, and 10974021).
Corresponding Authors:  Qi Yue-Ying     E-mail:  yying_qi@mail.zjxu.edu.cn

Cite this article: 

Qi Yue-Ying (祁月盈), Ye Dan-Dan (叶丹丹), Wang Jian-Guo (王建国), Qu Yi-Zhi (屈一至) Fast-electron-impact ionization process by 3p of hydrogen-like ions in Debye plasmas 2015 Chin. Phys. B 24 033403

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