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

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.052707· OSTI ID:21546775

Ma, X; Zhang, S F; Zhu, X L; Feng, W T; Li, B; Liu, H P ^[1]; Zhang, R T; Guo, D L; Yan, S C; Zhang, P J; Wang, Q ^[1]; Li, C Y; Wang, J G ^[2]

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1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
2. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

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.

• OSTI ID: 21546775
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.052707; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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