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  • 1
    Electronic Resource
    Electronic Resource
    Quantum screening effects on nonrelativistic electron–ion bremsstrahlung process in two-component plasmas (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 4647-4650 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Quantum screening effects on the nonrelativistic electron–ion bremsstrahlung process in two-component plasmas are investigated using the corrected Kelbg potential taking into account the classical effect as well as the quantum-mechanical effect. The Born approximation is assumed for the initial and final states of the projectile electron. The results show that the electron–ion bremsstrahlung radiation cross section decreases with increasing the de Broglie wavelength (λ). The quantum screening effect on the bremsstrahlung cross section increases with increasing the charge (Z) of the target ion. It is also found that the quantum screening effect on the bremsstrahlung cross section increases with increasing the radiation photon energy (cursive-epsilon). © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1396844
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  • 2
    Electronic Resource
    Electronic Resource
    Electron-impact ionization in classical nonideal plasmas (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 12-15 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron-impact ionization of hydrogenic ions is investigated in classical nonideal plasmas. The projectile–target interaction potential in classical nonideal plasmas is represented by the pseudopotential model. Semiclassical trajectory method is applied to the path of the projectile electron in order to visualize the ionization probability as a function of the impact parameter. The semiclassical ionization probability decreases with increasing the collective effect. It is also found that the collective effect increases with increasing the projectile energy. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1324658
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum-mechanical effects on low energy electron–ion Coulomb bremsstrahlung in dense high-temperature plasmas (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 1037-1039 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The low energy electron–ion Coulomb bremsstrahlung process is investigated in dense high-temperature plasmas including quantum-mechanical effects. An effective pseudopotential model taking into account both quantum-mechanical effects and plasma screening effects is applied to describe the electron–ion interaction potential in dense high-temperature plasmas. The straight-line trajectory method is applied to the motion of the projectile electron in order to investigate the variation of the bremsstrahlung radiation cross section as a function of the scaled impact parameter, thermal de Broglie wavelength, Debye length, projectile energy, and photon energy. The result shows that the quantum-mechanical effect reduces the bremsstrahlung radiation cross section in dense high-temperature plasmas. It is found that the quantum-mechanical effect is important for small impact parameters and more significant for the soft photon case. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1345710
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  • 4
    Electronic Resource
    Electronic Resource
    Plasma screening effects on inelastic Compton scattering of photons by hydrogenic ions in strongly coupled classical plasmas (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 819-822 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma screening effects on inelastic Compton scattering of photons by hydrogenic ions in uniformly distributed strongly coupled classical plasmas are investigated. The interaction potential in strongly coupled plasmas is given by the ion–sphere model. The screened radial atomic wave functions and energy eigenvalues for the 1s and 2p states of the hydrogenic target ion in strongly coupled plasmas are obtained by the Ritz variational and perturbational calculations. The expression for the lowest-order transition matrix element is obtained by a two photon process associated with terms quadratic in the vector potential A. The inelastic Compton scattering cross section from the 1s ground state to the 2p excited state is obtained as a function of the incident photon energy including the plasma screening effects through the ion–sphere radius. In strongly coupled plasmas, the plasma screening effect on the inelastic Compton scattering cross section is found to be stronger than that on the photoionization cross section. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873877
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  • 5
    Electronic Resource
    Electronic Resource
    Plasma screening effects on resonant Compton scattering of photons by hydrogenic ions in strongly coupled plasmas (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 2366-2369 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma screening effects on resonant Compton scattering of photons by bound atomic electrons from the ground state of hydrogenic ions in uniformly distributed strongly coupled plasmas are investigated. The interaction energy in strongly coupled plasmas is given by the ion-sphere model potential. The screened radial atomic wave functions and energy eigenvalues for the 1s and 2p states of the target hydrogenic ion in strongly coupled plasmas are obtained by the variation and perturbation methods. The transition matrix element near resonance is obtained by the lowest-order photon-perturbation Hamiltonian in the electronic dipole representation. The resonant Compton scattering cross section including the plasma screening effect is found to be smaller than that neglecting the plasma screening effect since the resonance frequency is increased due to the plasma screening effect. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.874073
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  • 6
    Electronic Resource
    Electronic Resource
    Image charge effects on bremsstrahlung radiation from electron–dust grain scatterings in dusty plasmas (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3396-3399 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Low energy bremsstrahlung process in electron–dust grain Coulomb scatterings in dusty plasmas is investigated using the classical trajectory method. Attractive interaction between the projectile electron and induced image charge inside the dust grain by the projectile electron is included to obtain the total interaction potential between the projectile electron and the dust particle. The classical straight-line trajectory method is applied to represent the differential bremsstrahlung radiation cross section as a function of the scaled impact parameter and projectile energy. The results show that there exists a nonradiation position in the bremsstrahlung radiation due to the balance between the repulsive and attraction interactions. The image charge effects on the bremsstrahlung radiation is dominant for small impact parameters. For large impact parameters, the image charge effect on the bremsstrahlung cross section for the hard photon radiation is found to be more significant than that for the soft photon radiation. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873579
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  • 7
    Electronic Resource
    Electronic Resource
    Plasma screening effects on photoionizations in weakly coupled plasmas (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 3781-3785 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma screening effects on photoionizations from the 1s state of hydrogenic ions in dense weakly plasmas are investigated. The particle interaction potential in weakly coupled plasmas is obtained by the static Debye-Hückel model. The initial bound wave function and energy eigenvalue of the target ion are modified in the Debye-Hückel potential using the Ritz variation method. The final state of the ejected photoelectron is represented by a plane wave solution. The Coulomb correction is considered using the screened Coulomb wave function. The photoionization cross section is obtained the acceleration form of the matrix element in order to investigate the plasma screening effects on the interaction potential. The screening effect is obtained as a function of the Debye length and photon energy. The retardation correction effect is also considered in obtaining the total 1s photoionization cross section in plasmas. The plasma screening effects on the photoionization cross section for the interesting domain of the Debye length, Λ≥10aZ, are found to be less than 10%. It is also found that the plasma screening effect is almost independent of the incident photon energy. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872742
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamic plasma screening effects on electron capture process in hydrogenic ion–fully stripped ion collisions in dense plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2756-2759 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In dense plasmas, dynamic plasma screening effects are investigated on electron capture from hydrogenic ions by past fully stripped ions. The classical Bohr–Lindhard model has been applied to obtain the electron capture probability. The interaction potential in dense plasmas is represented in terms of the longitudinal dielectric function. The classical straight-line trajectory approximation is applied to the motion of the projectile ion in order to visualize the electron capture probability as a function of the impact parameter, projectile energy, and plasma parameters. The electron capture probability including the dynamic plasma screening effect is always greater than that including the static plasma screening effect. When the projectile velocity is smaller than the electron thermal velocity, the dynamic polarization screening effect becomes the static plasma screening effect. When the projectile velocity is greater than the plasma electron thermal velocity, the interaction potential is almost unshielded. The difference between the dynamic and static plasma screening effects is more significant for low energy projectiles. It is found that the static screening formula obtained by the Debye–Hückel model overestimates the plasma screening effects on the electron capture processes in dense plasmas. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872144
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  • 9
    Electronic Resource
    Electronic Resource
    Response to "Comment on ‘Dynamic plasma screening effects on semiclassical inelastic electron–ion collisions in dense plasmas' " [Phys. Plasmas 4, 21 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2772-2773 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We used a semiclassical technique to calculate the interaction energy between the electron (velocity v) and the target electron by including the dynamic screening effect and effects on atomic transition processes. This differs from previous work. (AIP)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872407
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  • 10
    Electronic Resource
    Electronic Resource
    Plasma screening effects on eikonal phase for electron-ion elastic collisions in weakly coupled plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 4254-4257 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Eikonal approximation is applied to investigate elastic electron-ion collisions in weakly coupled plasmas. Plasma screening effects on eikonal phase are investigated for eikonal differential elastic scattering cross sections. The electron-ion interaction potential in weakly coupled plasmas has been obtained by the introduction of the longitudinal plasma dielectric function. The semiclassical straight-line trajectory method is applied to the path of the projectile electron in order to investigate the variation of the eikonal phase as a function of the impact parameter and the plasma parameters. In the first-order eikonal approximation, the dynamic plasma screening effect is identical to the static screening effect obtained by the Debye–Hückel potential. The eikonal differential elastic cross section substantially decreases with an increase in the projectile energy and increases as the plasma screening effect decreases through the Debye length. The plasma screening effects are more significant for large impact parameters. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872588
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