Wave-packet continuum-discretization approach to ion-atom collisions including rearrangement: Application to differential ionization in proton-hydrogen scattering

Abdurakhmanov, Ilkhom; Bailey, J.; Kadyrov, Alisher; Bray, Igor

doi:10.1103/physreva.97.032707

Cited by 48 publications

(52 citation statements)

References 56 publications

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“…The basic formalism of the wavepacket convergent close-coupling approach to proton-hydrogen collisions is given in [29,31]. It has been extended to two-electron targets in [32].…”

Section: Formalismmentioning

confidence: 99%

“…In this work we consider scattering of bare carbon ions on atomic hydrogen on a wide projectile energy range from 1 keV/amu to 10 MeV/amu using one unified approach and make a comparison of the obtained results with the published results of the MOCC, AOCC, CTMC, CDW-EIS, B1B and FBA approaches which perform well in various parts of the considered energy range. To this end our two-center semiclassical wavepacket convergent close-coupling (WP-CCC) approach [29] to protonhydrogen collisions is extended to take arbitrary charges and masses for the nuclei of the collision system. However, one must note that in these heavy particle collisions, the masses of the proton and carbon nucleus can be taken as infinite compared to that of the electron.…”

Section: Introductionmentioning

confidence: 99%

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Ionization and electron capture in collisions of bare carbon ions with hydrogen

et al. 2018

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Ionization and electron capture in collisions of bare carbon ions with atomic hydrogen has been studied using the wavepacket continuum discretization approach. The three-body Schrödinger equation governing the collision process is solved using the two-center expansion of the total scattering wavefunction. Calculations have been performed for the projectile energy range from 1 keV/amu to 10 MeV/amu. While there is excellent agreement with experimental data for the total electroncapture cross section over the entire energy range, the calculated total ionization cross section slightly overestimates the only available measured point. The singly and doubly differential ionization cross sections at 1 and 2.5 MeV/amu are in good agreement with experiment. The differential cross section calculations are extended to lower energies where perturbative methods are expected to fail. At 100 keV/amu impact energy the present singly differential cross section in the ejected angle of the electron shows a pronounced peak in the forward direction. It is concluded that at low incident energies electron capture into the continuum of the projectile strongly enhances electron ejection in the forward direction.

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“…The basic formalism of the wavepacket convergent close-coupling approach to proton-hydrogen collisions is given in [29,31]. It has been extended to two-electron targets in [32].…”

Section: Formalismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionization and electron capture in collisions of bare carbon ions with hydrogen

et al. 2018

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“…(35). Additionally, the cross sections for the two-electron processes of double excitation, double ionisation, and ionisation with excitation are calculated from the Born transition amplitudes (24) according to…”

Section: Stopping Powermentioning

confidence: 99%

“…The single-centre CCC approach has previously been applied to the calculation of stopping cross sections for antiproton collisions with atoms and molecules [17][18][19] and to the calculation of scattering cross sections for antiproton-hydrogen collisions [20,21]. Additionally, the two-centre CCC approach has been applied to the calculation of scattering cross sections for proton-hydrogen collisions [22][23][24]. Preliminary results of the protonhydrogen stopping cross section using the two-centre CCC approach have been reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

Proton-beam stopping in hydrogen

et al. 2019

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The stopping cross section for protons passing through hydrogen is calculated for the energy range between 10 keV and 3 MeV. Both the positive and neutral charge-states of the projectile are accounted for. The two-centre convergent close-coupling method is used to model proton collisions with hydrogen. In this approach electron-capture channels are explicitly included by expanding the scattering wave function in a basis of both target and projectile pseudostates. Hydrogen collisions with hydrogen are modelled using two methods: the single-centre convergent close-coupling approach is used for the calculation of one-electron processes, while two-electron processes are calculated using the Born approximation. The aforementioned approaches are also applied to the calculation of the charge-state fractions. These are then used to combine the proton-hydrogen and hydrogen-hydrogen stopping cross sections to yield the total stopping cross section for protons passing through hydrogen.

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“…In the case of heavy projectile collisions, these cross sections are theoretically often treated within perturbative models, e.g., [3]. For electron impact, non-perturbative methods are routinely applied, e.g., [4][5][6], however, for ion impact such approaches, e.g., [7][8][9][10] are much more challenging and still relatively rare compared to perturbative calculations. One well-established perturbative model is represented by the Born series.…”

Section: Introductionmentioning

confidence: 99%

Differential Study of Projectile Coherence Effects on Double Capture Processes in p + Ar Collisions

Voss

Lamichhane

Dhital

et al. 2020

Atoms

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We have measured differential yields for double capture and double capture accompanied by ionization in 75 keV p + Ar collisions. Data were taken for two different transverse projectile coherence lengths. A small effect of the projectile coherence properties on the yields were found for double capture, but not for double capture plus ionization. The results suggest that multiple projectile–target interactions can lead to a significant weakening of projectile coherence effects.

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Wave-packet continuum-discretization approach to ion-atom collisions including rearrangement: Application to differential ionization in proton-hydrogen scattering

Cited by 48 publications

References 56 publications

Ionization and electron capture in collisions of bare carbon ions with hydrogen

Ionization and electron capture in collisions of bare carbon ions with hydrogen

Proton-beam stopping in hydrogen

Differential Study of Projectile Coherence Effects on Double Capture Processes in p + Ar Collisions

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