Fast proton-hydrogen charge exchange reaction at small scattering angles

Vinitsky, P. S.; Popov, Yu. V.; Чулуунбаатар, О.

doi:10.1103/physreva.71.012706

Cited by 20 publications

(11 citation statements)

References 24 publications

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“…There is always the open question whether the Born series will even converge for charge transfer [40] and our results indicate that either the Born series converges to the second term or that the series does not converge for capture with target excitation. On the other hand, it is known that the series does converge for capture without target excitation [37,41]. Consequently, we believe that the Born series probably converges to the second term for capture with excitation.…”

Section: Resultsmentioning

confidence: 72%

“…If, in addition, the initial state is approximated as something other than a plane wave, then the second term in equation ( 3) does not vanish and we get some additional initial and final state contributions to parts of all higher order Born series terms. For electron capture without target excitation, it is well known that the second term in the Born series is important [37]. Consequently, the primary question for calculations based upon equation ( 3) is whether appropriate choices for initial and final state wavefunctions will contain the important physics in the second and higher order Born series terms.…”

Section: Theorymentioning

confidence: 99%

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Four-body charge transfer processes in proton–helium collisions

Chowdhury¹,

Harris²,

Peacher³

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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Recent advancements in experimental techniques now allow for the study of fully differential cross sections (FDCS) for four-body collisions. The simplest four-body problem is a charged particle collision with a helium atom, in which both atomic electrons change state. This type of collision can result in many different outcomes, such as double excitation, excitation ionization, double ionization, transfer excitation, transfer ionization and double charge transfer. In this paper, we compare absolute experimental proton–helium FDCS for transfer excitation with the fully quantum mechanical 4BTTE (four-body transfer with target excitation) model. This model was previously used to study TTE for proton energies between 25 and 75 keV and reasonable agreement was found with the experimental data for large scattering angles, but not small angles. Since this is a first-order model, which contains contributions from all higher order terms, one would expect improved agreement with increasing energy and the purpose of this work was to look at higher energies. We found that the agreement with the magnitude of the experimental data became worse with increasing energy while the agreement with the shape of the data was reasonably good. Consequently, we conclude that the model contains the physical effects that determine the shape but not the magnitude of the cross section.

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Section: Resultsmentioning

confidence: 72%

Section: Theorymentioning

confidence: 99%

Four-body charge transfer processes in proton–helium collisions

Chowdhury¹,

Harris²,

Peacher³

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…In recent years, substantial progress has been made in this field due to refinements in experimental techniques and theoretical treatments [4][5][6][7][8][9][10][11][12]. Swift ion-atom collisions followed, e.g., by excitation or ionization of the target are in most cases well-described theoretically in the first perturbative order with respect to the projectile-target interaction, i.e., in the first Born approximation.…”

Section: Introductionmentioning

confidence: 99%

Importance of Thomas single-electron transfer in fastp-He collisions

et al. 2010

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We report experimental angular differential cross sections for nonradiative single-electron capture in p-He collisions (p + He → H + He + ) with a separate peak at the 0.47 mrad Thomas scattering angle for energies in the 1.3-12.5 MeV range. We find that the intensity of this peak scales with the projectile velocity as v −11 P . This constitutes the first experimental test of the prediction from 1927 by L. H. Thomas [Proc. R. Soc. 114, 561 (1927)]. At our highest energy, the peak at the Thomas angle contributes with 13.5% to the total integrated nonradiative single-electron capture cross section.

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“…In particular, the matrix element corresponding to the classical Thomas mechanism [7] considerably compensates for the terms A2 + A3, and approaches the SDCS to that including only the OBK term. Also the Coulomb interaction of heavy particles is important here (see, for example, [27] and references therein).…”

Section: Resultsmentioning

confidence: 99%