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Title: Electron emission from single-electron capture with simultaneous single-ionization reactions in 30-keV/u He{sup 2+}-on-argon collisions

Abstract

Electron emission from the single-electron capture with simultaneous single ionization in 30 keV/u He{sup 2+} on argon was investigated using a reaction microscope, providing the electron energy spectra and momentum distributions. Intensive peaks for electrons with near-zero kinetic energies have been observed. It is demonstrated that mechanisms contributing to the electron emission include direct transfer ionization (DTI), double-electron capture with autoionization (DECA), and single-electron capture with autoionization (SECA) of target. Comparison of resonance energies shows that Ar{sup +} ions in SECA decay mainly through the 3s3p{sup 5}3d states by emitting Auger electrons, and He** in DECA decay through the 2l2l' states. The dependence of electron emission on the transverse momentum exchange has been studied. In the transfer ionization channel studied here, the DTI process dominates the electron emission, and no saddle point electron mechanism has been found.

Authors:
; ; ; ; ;  [1]; ; ; ; ;  [1]; ;  [2]
  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
  2. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)
Publication Date:
OSTI Identifier:
21546775
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.83.052707; (c) 2011 American Institute of Physics; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ARGON; ARGON IONS; AUTOIONIZATION; ELECTRON CAPTURE; ELECTRON EMISSION; ENERGY SPECTRA; HELIUM IONS; ION-ATOM COLLISIONS; KINETIC ENERGY; MICROSCOPES; RESONANCE; TRANSVERSE MOMENTUM; ATOM COLLISIONS; CAPTURE; CHARGED PARTICLES; COLLISIONS; ELEMENTS; EMISSION; ENERGY; FLUIDS; GASES; ION COLLISIONS; IONIZATION; IONS; LINEAR MOMENTUM; NONMETALS; RARE GASES; SPECTRA

Citation Formats

Ma, X, Zhang, S F, Zhu, X L, Feng, W T, Li, B, Liu, H P, Zhang, R T, Guo, D L, Yan, S C, Zhang, P J, Wang, Q, Graduate University of Chinese Academy of Sciences, Beijing 100049, Li, C Y, and Wang, J G. Electron emission from single-electron capture with simultaneous single-ionization reactions in 30-keV/u He{sup 2+}-on-argon collisions. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.83.052707.
Ma, X, Zhang, S F, Zhu, X L, Feng, W T, Li, B, Liu, H P, Zhang, R T, Guo, D L, Yan, S C, Zhang, P J, Wang, Q, Graduate University of Chinese Academy of Sciences, Beijing 100049, Li, C Y, & Wang, J G. Electron emission from single-electron capture with simultaneous single-ionization reactions in 30-keV/u He{sup 2+}-on-argon collisions. United States. https://doi.org/10.1103/PHYSREVA.83.052707
Ma, X, Zhang, S F, Zhu, X L, Feng, W T, Li, B, Liu, H P, Zhang, R T, Guo, D L, Yan, S C, Zhang, P J, Wang, Q, Graduate University of Chinese Academy of Sciences, Beijing 100049, Li, C Y, and Wang, J G. 2011. "Electron emission from single-electron capture with simultaneous single-ionization reactions in 30-keV/u He{sup 2+}-on-argon collisions". United States. https://doi.org/10.1103/PHYSREVA.83.052707.
@article{osti_21546775,
title = {Electron emission from single-electron capture with simultaneous single-ionization reactions in 30-keV/u He{sup 2+}-on-argon collisions},
author = {Ma, X and Zhang, S F and Zhu, X L and Feng, W T and Li, B and Liu, H P and Zhang, R T and Guo, D L and Yan, S C and Zhang, P J and Wang, Q and Graduate University of Chinese Academy of Sciences, Beijing 100049 and Li, C Y and Wang, J G},
abstractNote = {Electron emission from the single-electron capture with simultaneous single ionization in 30 keV/u He{sup 2+} on argon was investigated using a reaction microscope, providing the electron energy spectra and momentum distributions. Intensive peaks for electrons with near-zero kinetic energies have been observed. It is demonstrated that mechanisms contributing to the electron emission include direct transfer ionization (DTI), double-electron capture with autoionization (DECA), and single-electron capture with autoionization (SECA) of target. Comparison of resonance energies shows that Ar{sup +} ions in SECA decay mainly through the 3s3p{sup 5}3d states by emitting Auger electrons, and He** in DECA decay through the 2l2l' states. The dependence of electron emission on the transverse momentum exchange has been studied. In the transfer ionization channel studied here, the DTI process dominates the electron emission, and no saddle point electron mechanism has been found.},
doi = {10.1103/PHYSREVA.83.052707},
url = {https://www.osti.gov/biblio/21546775}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 83,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2011},
month = {Sun May 15 00:00:00 EDT 2011}
}