Semiclassical electron capture probabilities for proton–hydrogenic ion collisions in dense plasmas

Kim, Chang-Geun; Jung, Young-Dae

doi:10.1063/1.872968

Cited by 39 publications

(17 citation statements)

References 18 publications

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“…The early studies involving heavy-particle collisions in hot, dense plasmas are those for proton-impact excitation of n=2 fine structure levels of hydrogen-like ions within a close-coupling scheme employing both the static Debye-Hückel and the ion-sphere model potentials [2], the electron capture in proton-hydrogenic ion collisions [113] and the symmetric the resonant charge exchange in hydrogen-like ion-parent nucleus collisions [114] by the classical Bohr-Lindhard model, and the classical trajectory Monte Carlo study of electron capture and ionization in hydrogen atom-fully stripped ion collisions [115]. However in those studies, the changes of the electronic structures (wave functions and energy levels) in the screened potential were taken into account at most within the first-order perturbation theory.…”

Section: Heavy Particle Collisionsmentioning

confidence: 99%

Review of quantum collision dynamics in Debye plasmas

Janev

Zhang

Wang

2016

Matter and Radiation at Extremes

144

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Hot, dense plasmas exhibit screened Coulomb interactions, resulting from the collective effects of correlated many-particle interactions. In the lowest particle correlation order (pair-wise correlations), the interaction between charged plasma particles reduces to the Debye-Hückel (Yukawa-type) potential, characterized by the Debye screening length D. Due to the importance of Coulomb interaction screening in dense laboratory and astrophysical plasmas, hundreds of theoretical investigations have been carried out in the past few decades on the plasma screening effects on the electronic structure of atoms and their collision processes employing the Debye-Hückel screening model. The present article aims at providing a comprehensive review of the recent studies in atomic physics in Debye plasmas. Specifically, the work on atomic electronic structure, photon excitation and ionization, electron/positron impact excitation and ionization, and excitation, ionization and charge transfer of ion-atom/ion collisions will be reviewed.

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Section: Heavy Particle Collisionsmentioning

confidence: 99%

Review of quantum collision dynamics in Debye plasmas

Janev

Zhang

Wang

2016

Matter and Radiation at Extremes

144

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“…It is to be mentioned here that the distorted wave amplitude (5) has been used to calculate the differential cross section for all transitions. We have included all significant partial wave contributions to the distorted wave amplitude and approximated the higher partial wave contributions to the distorted wave amplitudes by the corresponding FBA (First Born Approximation) values.…”

Section: Resultsmentioning

confidence: 99%

Positron impact excitations of hydrogen atom embedded in dense quantum plasmas: Formation of Rydberg atoms

Rej

Ghoshal

2014

Physics of Plasmas

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Formation of Rydberg atoms due to 1 s ! nlm excitations of hydrogen by positron impact, for arbitrary n, l, m, in dense quantum plasma has been investigated using a distorted wave theory which includes screened dipole polarization potential. The interactions among the charged particles in the plasma have been represented by exponential cosine-screened Coulomb potentials. Making use of a simple variationally determined hydrogen wave function, it has been possible to obtain the distorted wave scattering amplitude in a closed analytical form. A detailed study has been made to explore the structure of differential and total cross sections in the energy range 20-300 eV of incident positron. For the unscreened case, our results agree nicely with some of the most accurate results available in the literature. To the best of our knowledge, such a study on the differential and total cross sections for 1 s ! nlm inelastic positron-hydrogen collisions in dense quantum plasma is the first reported in the literature. V C 2014 AIP Publishing LLC.

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“…A recent investigation 14 shows that the plasma screening effects on the target system are found be quite small, so that the total dynamic screening effects on the electron capture process is mainly determined by the strength of the dynamic screening effects on the electron capture radius. Thus, we here consider the static screening effects on the target wave function rather than the dynamic screening effects.…”

Section: Semiclassical Electron Capture Probabilitymentioning

confidence: 99%

Dynamic plasma screening effects on semiclassical electron captures from hydrogenic ions by protons in weakly coupled plasmas

Kim

Jung

1998

Physics of Plasmas

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Electron capture processes by protons from hydrogenic ions in dense plasmas, including dynamic screening effects, are investigated using the semiclassical version of the Bohr and Lindhard model with the straight-line trajectory method. The dynamic interaction potential and screened electron radius are obtained by considering the longitudinal component of the plasma dielectric function. The scaled semiclassical electron capture probability is obtained as a function of the impact parameter, Debye length, and projectile velocity. The plasma screening effects on the target system is known to be quite small, so that the plasma screening effects on the capture probability is mainly determined by the screened capture radius. The dynamic screening effect on the scaled semiclassical capture probability is found to be more significant for low projectile velocities. When the projectile velocity is smaller than the electron thermal velocity, the dynamic screening effect is weaker than the static screening effect. However, when the projectile velocity is greater than the electron thermal velocity, the dynamic screening effect leads to the static screening effect. The maximum position of the scaled capture probability approaches to the target nucleus as an increase of the projectile energy.

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Semiclassical electron capture probabilities for proton–hydrogenic ion collisions in dense plasmas

Cited by 39 publications

References 18 publications

Review of quantum collision dynamics in Debye plasmas

Review of quantum collision dynamics in Debye plasmas

Positron impact excitations of hydrogen atom embedded in dense quantum plasmas: Formation of Rydberg atoms

Dynamic plasma screening effects on semiclassical electron captures from hydrogenic ions by protons in weakly coupled plasmas

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