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

doi:10.1088/1674-1056/24/3/033403

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

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