Cross sections for single and double electron capture from He++ on hydrogen, neon and argon

Baragiola, R. A.; Nemirovsky, I. B.

doi:10.1016/0029-554x(73)90737-4

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…Although the present data are about 1.0 × 10 −16 cm 2 larger than the measurements of Abdelrahman et al, [14] the present SEC cross sections support the falling trend below the energy of about 0.5 keV/u. When the collision energies are above 0.5 keV/u, the ETF effects can increase the SEC cross sections by 15%-25%, which are in accord with the TDDFT results of Hong et al [19] In several keV/u, the present SEC cross sections are lower than the data of Hong et al [19] while lie between the measurements of Rudd et al [8] and Baragiola et al [11] Generally, the DEC cross sections are smaller than those of SEC as larger energy gaps and no strong couplings with the initial state. The present DEC cross sections lie between the experimental data of Silva et al [15] and Hanaki et al [13] in the overlapping energy region.…”

Section: -3supporting

confidence: 90%

“…In this energy region, the present data are less than 1.0 × 10 −16 cm 2 larger than the measurements of Hanaki et al [13] and Silva et al [15] as well as lower than the results of Afrosimov et al, [12] but lie between them in the overlapping energy region. In several keV/u, the present SEC cross sections lie between the measurements of Rudd et al [8] and Baragiola et al [11] Internuclear distance R (a. u.)…”

Section: -3supporting

confidence: 88%

“…Comparisons of the present QMOCC electron capture cross sections with other experimental and theoretical results. Theory: the present QMOCC (solid line with circle), the time-dependent density functional theory (TDDFT) results of Hong et al [19] (solid line), the Landau-Zener theory (LZ) results of Abdelrahman et al [14] (dashed line); experiment: Silva et al [15] (full square), Abdelrahman et al [14] (full pentagon), Rudd et al [8] (full hexagon), Hanaki et al [13] (diamond), Baragiola et al [11] (inverted full triangle), Afrosimov et al [12] (full triangle). (a) For SEC cross sections, and (b) for DEC cross sections.…”

Section: -3mentioning

confidence: 99%

“…Many earlier works have studied the charge exchange process by the He 2+ -Ne collisions. For the experimental work, e.g., Rudd et al, [8] Dubois et al [9,10] and Baragiola et al, [11] have measured the electron capture and ionization cross sections of He 2+ -Ne in the energy range above 5 keV/u. Afrosimov et al [12] observed the single-electron capture processes in the impact energies of 0.68-10 keV/u.…”

mentioning

confidence: 99%

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Ab Initio Study of Single- and Double-Electron Capture Processes in Collisions of He²⁺ Ions and Ne Atoms

Wang¹,

Wang²,

Peng³

et al. 2021

Chinese Phys. Lett.

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The single- and double-electron capture (SEC, DEC) processes of He2+ ions colliding with Ne atoms are studied by utilizing the full quantum-mechanical molecular-orbital close-coupling method. Total and state-selective SEC and DEC cross sections are presented in the energy region of 2 eV/u to 20 keV/u. Results show that the dominant reaction channel is Ne+(2s2p 6 2 S) + He+(1s) in the considered energy region due to strong couplings with the initial state Ne(2s 22p 6 1 S) + He2+ around the internuclear distance of 4.6 a.u. In our calculations, the SEC cross sections decrease initially and then increase whereby, the minimum point is around 0.38 keV/u with the increase of collision energies. After considering the effects of the electron translation factor (ETF), the SEC cross sections are increased by 15%–25% nearby the energy region of keV/u and agree better with the available results. The DEC cross sections are smaller than those of SEC because of the larger energy gaps and no strong couplings with the initial state. Due to the Demkov-type couplings between DEC channel Ne2+(2s22p 4 1 S) + He(1s 2) and the dominating SEC channel Ne+(2s2p 6 2 S) + He+(1s), the DEC cross sections increase with increasing impact energies. Good consistency can also be found between the present DEC and the experimental measurements in the overlapping energy region.

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