Diffusion-transport cross section and stopping power of swift heavy ions

Maynard, G.; Zwicknagel, G.; Deutsch, C.; Katsonis, K.

doi:10.1103/physreva.63.052903

Cited by 31 publications

(22 citation statements)

References 57 publications

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“…Apart from a few exceptions [11][12][13][14][15][16] most of the theoretical work published after the paper of Lindhard [10] has treated the Barkas effect as a consequence of close collisions [17][18][19][20][21][22][23][24][25][26][27][28]. The Barkas effect at close collision not only affects the stopping power but also manifests itself in other physical areas, but the corresponding interconnections are less known.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Barkas effect with keV-electron scattering

Grande

Vos

2013

Phys. Rev. A

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The energy loss of fast ions at close collision is mainly due to electron-ion collisions. The electrons are approximately stationary and they collide with a fast-moving ion. Here we study the same collision experimentally, in a reference system where the ions (or atoms) are stationary and interacting with keV electrons. Scattering cross sections under these conditions deviate from Rutherford, and we link these deviations, at higher energies, to the Z 3 contributions to the electronic stopping and the related Barkas effect and, at lower energies, also to quantum interference. The present measurements are well described by partial-wave calculations of the elastic cross section of electrons scattering from atoms. Encouraged by this agreement we use these calculations to estimate the Barkas factor for all elements and many energies. A universal curve for the Barkas factor due to close collisions is obtained for neutral projectiles and similar curves with smaller magnitude are found for ions.

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Section: Introductionmentioning

confidence: 99%

Exploring the Barkas effect with keV-electron scattering

Grande

Vos

2013

Phys. Rev. A

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“…When a point charge calculation in first-order theory is able to reproduce rather well the stopping power for the averaged charge state, only full calculation is found to be consistent with the full set of stopping cross-sections. The comparison done with the theoretical calculations using the CKLT [16] and the UCA [14] demonstrates that relatively simple models may, at least for low atomic number target atoms, adequately take into account the high-order corrections terms of the stopping cross-section by using a realistic atomic potential for the projectile.…”

Section: Resultsmentioning

confidence: 97%

“…We present results obtained using the Convergent Kinetic with Lindhard screening Theory (CKLT) [16][17][18] developed by two of the present authors in connection with Orsay experiments. We have also made calculations within the Unitary Convolution Approximation (UCA) of Ref.…”

Section: Stopping Cross-sections Calculationsmentioning

confidence: 97%

“…Recently, several stopping theories have been proposed [14][15][16] to perform non-linear stopping calculations of S e e with a non-Coulomb interaction potential. We present results obtained using the Convergent Kinetic with Lindhard screening Theory (CKLT) [16][17][18] developed by two of the present authors in connection with Orsay experiments.…”

Section: Stopping Cross-sections Calculationsmentioning

confidence: 99%

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Energy loss of Clq+ (52MeV) through dilute H2 target: Evidence of non-linear term and non-Coulombian potential contribution

Chabot¹,

Nectoux²,

Maynard³

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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“…However, it involves some non-negligible numerical efforts. The considerably simpler convergent kinetic Lindhard theory (CKLT) model by Maynard et al was initially devised for heavy ions in plasmas and has been extended to neutral target systems as well [23]. It is also applicable to intermediate and high energies.…”

Section: Introductionmentioning

confidence: 99%

Introducing electron capture into the unitary-convolution-approximation energy-loss theory at low velocities

Schiwietz

Grande

2011

Phys. Rev. A

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Recent developments in the theoretical treatment of electronic energy losses of bare and screened ions in gases are presented. Specifically, the unitary-convolution-approximation (UCA) stopping-power model has proven its strengths for the determination of nonequilibrium effects for light as well as heavy projectiles at intermediate to high projectile velocities. The focus of this contribution will be on the UCA and its extension to specific projectile energies far below 100 keV/u, by considering electron-capture contributions at charge-equilibrium conditions.

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Diffusion-transport cross section and stopping power of swift heavy ions

Cited by 31 publications

References 57 publications

Exploring the Barkas effect with keV-electron scattering

Exploring the Barkas effect with keV-electron scattering

Energy loss of Clq+ (52MeV) through dilute H2 target: Evidence of non-linear term and non-Coulombian potential contribution

Introducing electron capture into the unitary-convolution-approximation energy-loss theory at low velocities

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