Single and double electron capture in p-He and<i>α</i>-He collisions

Samaddar, S.; Halder, S.; Mondal, Anup; Mandal, Chittaranjan; Purkait, M.; Das, Tirthanath

doi:10.1088/1361-6455/aa5ed3

Cited by 16 publications

(3 citation statements)

References 64 publications

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“…where X q+ P is a hydrogen-like projectiles (H and He + ). Moreover, we obtained the differential cross sections for the reaction (13) where the projectile has been taken as He + . Variation of the TCS with the incident energy of the projectile ions are presented in graphical form in figures 1-6, respectively.…”

Section: Resultsmentioning

confidence: 99%

Electron-capture cross sections from atoms to hydrogen-like projectiles

Samaddar¹,

Jana²,

Purkait³

et al. 2020

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

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State-selective total and projectile angular-differential cross sections for single-electron transfer to the ground state from atoms in collisions with hydrogen-like projectiles are calculated by means of the four-body distorted wave approximation in the energy range from 25 to 2500 keV amu−1. In the initial channel, the effect of the dynamic electron–electron correlation is explicitly taken into account through the complete perturbation potentials. Distortion in the initial channel due to the Coulomb continuum states of the target and the active electron in the field of the residual projectile ion is included. The quantum-mechanical prior and post transition amplitudes for single-electron capture for symmetric and asymmetric collisions are then derived in terms of three-dimensional real integrals. The role of dynamic inter-electron correlation on the cross sections as a function of the impact energy is examined. Only for He+–He collisions, the projectile angular-differential cross sections for ground state capture are calculated at different impact energies. We investigate the effect of the total cross section as well as the projectile angular-differential cross sections to the choice of different ground state wavefunction of the projectile in the final state. It is observed that although the shape of the differential cross section does not change significantly for these functions, there is a significant change of the differential cross sections due to the choice of the target description. The differential cross section reveals pronounced minima and maxima in the projectile scattering angles as the projectile energy decreases. The observed structure demonstrates the analogy of atomic de Broglie’s matter-wave scattering and Fraunhofer-type diffraction. Finally the validity of our results is assessed by comparison with available experimental data.

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Section: Resultsmentioning

confidence: 99%

Electron-capture cross sections from atoms to hydrogen-like projectiles

Samaddar¹,

Jana²,

Purkait³

et al. 2020

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

Self Cite

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“…Thanks to computational advances, there are now many 4-body models in use for the single capture process [2,[14][15][16][17][18][19][20][21][22][23][24] with varying degrees of agreement between each other and experiment. Combined with the numerous 3-body models present in the literature, there is no shortage of calculations for the single capture process.…”

Section: Introductionmentioning

confidence: 99%

Frozen Core Approximation and Nuclear Screening Effects in Single Electron Capture Collisions

Harris

2019

Atoms

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Fully Differential Cross Sections (FDCS) for single electron capture from helium by heavy ion impact are calculated using a frozen core 3-Body model and an active electron 4-Body model within the first Born approximation. FDCS are presented for H + , He 2+ , Li 3+ , and C 6+ projectiles with velocities of 100 keV/amu, 1 MeV/amu, and 10 MeV/amu. In general, the FDCS from the two models are found to differ by about one order of magnitude with the active electron 4-Body model showing better agreement with experiment. Comparison of the models reveals two possible sources of the magnitude difference: the inactive electron's change of state and the projectile-target Coulomb interaction used in the different models. Detailed analysis indicatesthat the uncaptured electron's change of state can safely be neglected in the frozen core approximation, but that care must be used in modeling the projectile-target interaction.

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“…In recent decades, different research groups have been engaged in experimental and theoretical studies of excitation, ionization and electron capture in atomic and molecular collisions. This research concerns the significance and extensive applications of such phenomena in astrophysics, plasma physics and other branches of science [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In addition to the importance of these processes in their practical applications, the study of such collisions is also essential to improve our understanding of the few-body problem in atomic and molecular physics [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Classical and semiclassical simulations of differential single charge exchange in fast alpha-helium collisions

Velayati

Ghanbari-Adivi

Ghorbani

2018

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

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Within the framework of an independent particle model, the differential single charge transfer process in the collision of fast helium ions with neutral helium targets is theoretically studied by means of the classical trajectory Monte Carlo(CTMC) method. Also, the specified reactions are investigated using two semiclassical continuum distorted wave models with eikonal initial and final states. These theories are usually identified as CDW-EIS and CDW-EFS. Using the CTMC theory, both the electron capture and the excitation probabilities are estimated and discussed as functions of the collision impact parameter. Also, the distribution of the final projectile (n, l) states and the impact parameter dependence of the electron transfer to the final n levels are investigated. Using the theories, the projectile angular distribution of the fully differential crosssections are calculated for several impact energies in the range of 60-630keV/u for which the experimental data are available. The obtained results are compared to each other and to their corresponding experimental values. In most of the considered cases, comparisons show that the applied treatments are in qualitative agreement with the experimental data.

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Single and double electron capture in p-He andα-He collisions

Cited by 16 publications

References 64 publications

Electron-capture cross sections from atoms to hydrogen-like projectiles

Electron-capture cross sections from atoms to hydrogen-like projectiles

Frozen Core Approximation and Nuclear Screening Effects in Single Electron Capture Collisions

Classical and semiclassical simulations of differential single charge exchange in fast alpha-helium collisions

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