Dynamic correlation effects in fully differential cross sections for 75-keV proton-impact ionization of helium

Niu, Xiaojie; Sun, Shiyan; Wang, Fujun; Jia, Xiaofang

doi:10.1103/physreva.96.022703

Cited by 7 publications

(20 citation statements)

References 24 publications

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“…[15] in the modified Coulomb-Born approximation, where NN was also included (MCB-PI). Recently, within the framework of a Born-like approximation a continuum correlated wave (CCW) function has been applied for the final sate [16]. Correlated motion of the ionized electron in the field of heavy particles, considered beyond the three Coulomb (3C) model, and the [13].…”

Section: Comparison To and Discussion Of Other Studiesmentioning

confidence: 99%

“…Correlated motion of the ionized electron in the field of heavy particles, considered beyond the three Coulomb (3C) model, and the [13]. Dashed lines: CCW-PT calculations [16]. Dot dashed lines: 3C calculations [14].…”

Section: Comparison To and Discussion Of Other Studiesmentioning

confidence: 99%

“…For atomic targets the size of the diffracting object is the typical impact parameter separation between the contributing processes, like first-and higher-order transition mechanisms [5]. This phenomena was justified in the process of transfer ionization in 16 MeV O 7+ -He collision [19]. However, no interference was found for single ionization, as this process has been found to take place at impact parameters which are larger than the projectile coherence length applied in the study.…”

Section: Introductionmentioning

confidence: 87%

“…Recently, Schultz et al [12] measured the FDCS for single ionization of Helium by 75-keV proton impact. Their experimental results were compared to data of various distorted wave calculations, including the continuum-distorted wave with eikonal initial state (CDW-EIS) approximation [13][14][15][16]. The important role of interaction between the nuclei has been observed, and reasonably accounts of the measured FDCS were reported mostly in the collisions plane.…”

Section: Introductionmentioning

confidence: 99%

“…Applying independent electron and impact parameter pictures, the one-electron transition amplitudes are evaluated in the CDW-EIS model, where the role of nucleusnucleus interaction (NN) is taken into account by a phase factor. The importance of including the NN interaction in the treatments was emphasized in previous studies [13][14][15][16]. However, in these studies the effects of nonactive electron, the role of the He + core, were considered by a Coulomb potentials with effective charge.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical investigation of the fully differential cross sections for single ionization of He in collisions with 75-keV protons

2019

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We present a theoretical investigation of the single ionization of He in collisions with H + projectile ions at 75-keV impact energy. Using the frameworks of the independent-electron model and the impact parameter picture, fully differential cross sections (FDCS) are evaluated in the continuum distorted-wave with eikonal initial-state approximation (CDW-EIS). Comparisons are made to the recent measurements of Schulz et al. [Phys. Rev. A 73, 062704 (2006)] and Arthanayaka et al. [J. Phys. B: At. Mol. Opt. Phys. 49, 13LT02 (2016)]. Strong influence of the internuclear interaction and effects of target core polarization due to the presence of the projectile ion are observed. Comparing the present results to experimental data and other theoretical predictions, it has been found that the CDW-EIS method qualitatively reproduces structures in the FDCS. Projectile coherence effects are investigated by representing the projectile beam as a Gaussian wave packet. Evidence of interference effects due to projectile-electron and projectile-target core interactions are discussed and the need for further theoretical investigations is proposed.

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Section: Comparison To and Discussion Of Other Studiesmentioning

confidence: 99%

Section: Comparison To and Discussion Of Other Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Theoretical investigation of the fully differential cross sections for single ionization of He in collisions with 75-keV protons

2019

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Electron capture to the continuum manifestation in fully differential cross sections for ion impact single ionization

Ciappina

Fojón

Rivarola

2018

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

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We present theoretical calculations of single ionization of He atoms by protons and multiply charged ions. The kinematical conditions are deliberately chosen in such a way that the ejected electron velocity matches the projectile impact velocity. The computed fully differential cross sections (FDCS) in the scattering plane using the continuum-distorted wave-eikonal initial state show a distinct peaked structure for a polar electron emission angle θ k =0°. This element is absent when a first order theory is employed. Consequently, we can argue that this peak is a clear manifestation of a three-body effect, not observed before in FDCS. We discuss a possible interpretation of this new feature.

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Double differential cross sections for ionization of H by 75 keV proton impact: Assessing the role of correlated wave functions*

Fan¹,

Miao²,

Jia³

2020

Chinese Phys. B

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The effect of final-state dynamic correlation is investigated for ionization of atomic hydrogen by 75-keV proton impact by analyzing double differential cross sections. The final state is represented by a continuum correlated wave (CCW-PT) function which accounts for the interaction between the projectile and the target nucleus (PT interaction). The correlated final state is nonseparable solutions of the wave equation combining the dynamics of the electron motion relative to the target and projectile, satisfying the Redmond’s asymptotic conditions corresponding to long range interactions. The transition matrix is evaluated using the CCW-PT function and the undistorted initial state. Both the correlation effects and the PT interaction are analyzed by the present calculations. The convergence of the continuous correlated final state is examined carefully. Our results are compared with the absolute experimental data measured by Laforge et al. [Phys. Rev. Lett. 103, 053201 (2009)] and Schulz et al. [Phys. Rev. A 81, 052705 (2010)], as well as other theoretical models (especially the results of the latest non perturbation theory). We have shown that the dynamic correlation plays an important role in the ionization of atomic hydrogen by proton impact. While overall agreement between theory and the experimental data is encouraging, detailed agreement is still lacking. However, such an analysis is meaningful because it provides valuable information about the dynamical correlation and PT interaction in the CCW-PT theoretical model.

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Dynamic correlation effects in fully differential cross sections for 75-keV proton-impact ionization of helium

Cited by 7 publications

References 24 publications

Theoretical investigation of the fully differential cross sections for single ionization of He in collisions with 75-keV protons

Theoretical investigation of the fully differential cross sections for single ionization of He in collisions with 75-keV protons

Electron capture to the continuum manifestation in fully differential cross sections for ion impact single ionization

Double differential cross sections for ionization of H by 75 keV proton impact: Assessing the role of correlated wave functions*

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