Procedure for Computing Cross Sections for Single and Multiple Ionization of Atoms in the Binary-Encounter Approximation by the Impact of Heavy Charged Particles

McGuire, J. H.; Richard, Patrick

doi:10.1103/physreva.8.1374

Cited by 245 publications

(73 citation statements)

References 36 publications

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“…Also plotted in the figures are the predictions of the theoretical models e.g. BEA of McGuire and Richard [6,11] and the geometrical model of Sulik et al [8,10]. It is observed that the geometrical model provides a much better description of the data.…”

Section: Analysis and Discussionmentioning

confidence: 92%

Heavy ion induced multiple ionization in gold

Bhattacharya

Kuri

Mahapatra

et al. 1993

Z Phys D - Atoms, Molecules and Clusters

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Section: Analysis and Discussionmentioning

confidence: 92%

Heavy ion induced multiple ionization in gold

Bhattacharya

Kuri

Mahapatra

et al. 1993

Z Phys D - Atoms, Molecules and Clusters

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“…Among the simple, semiclassical approximations describing ionization, the binary-encounter model (BEM) is one of the more successful schemes (Gryzinski 1965;McGuire & Richard 1973;Peter & Meyer-ter-Vehn 1991). Following Gryzinski (1965), the cross section for a single protonimpact ionization from a total of n j electrons in the jth subshell of the projectile ion is given by:…”

Section: The Bem Cross Sectionmentioning

confidence: 99%

Charge-equilibration of Fe ions accelerated in a hot plasma

Kovaltsov

Barghouty

Kocharov

et al. 2001

A&A

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Abstract.We examine the energy-dependent rates of charge-changing processes of energetic Fe ions in the hot plasma of the solar corona. For ionization of the Fe-ion projectile in collisions with ambient protons, three different methods of estimating the corresponding ionization cross sections are presented and compared. Proton-impact ionization is found to be significant irrespective of the particular method used. Differences in the proton-impact ionization cross sections' estimates are shown to have little effect in calculating highly nonequilibrium Fe charge states during acceleration, whereas equilibrium charge states are sensitive to such differences. A parametric study of the Fe charge-equilibration comprises (i) impact of the ambient plasma density, and (ii) the energy dependence impact of the acceleration rate upon the charge-energy profiles and upon the estimated values of the density × acceleration-time product. We emphasize potential importance of careful measurements of charge-energy profiles along with ion energy spectra for determining the energy dependence of ion acceleration time and the energy dependence of the leaky-box escape time.

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“…Under our experimental condition, 6 MeV/amu, a dominant mechanism for the multiple KE' ionization is the Coulomb excitation. Multiple Coulomb ionization theories based on the binary-encounter approximation (BEA) [16] and the semiclassical approximation (SCA) [17] have been described by several authors. The experimental satellite intensity distributions have successfully been described by the average Lshell ionization probability at the zero impact parameter PL(0) for light ion impact but not for heavy ion collision [18].…”

Section: A Experimental L Vacancy Rearrangement Probabilitymentioning

confidence: 99%

“…In the high incident energy region, however, the correlation effects between ejected and orbital electrons are relatively unimportant in the single K plus multiple L-electron ejection process, and then the intensity distribution of the K~ X-ray satellite lines is well characterized by the binomial distribution. Assuming no difference between 2s and 2p subshells, the L-shell primary vacancy distribution y, [16] is expressed as…”

Section: A Experimental L Vacancy Rearrangement Probabilitymentioning

confidence: 99%