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  • 1
    Electronic Resource
    Electronic Resource
    Bremsstrahlung emission from ion–dust grain Coulomb scatterings in dusty plasmas (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 715-718 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bremsstrahlung processes in ion–dust grain Coulomb scatterings in dusty plasmas are investigated using the classical trajectory method. Attractive interaction between the projectile ion and its own image charge inside the positively charged dust grain is included to obtain the total interaction potential between the projectile ion and the dust grain. The classical straight-line trajectory method is applied to represent the differential radiation cross section as a function of the scaled impact parameter, projectile energy, and photon energy. The result shows that the induced image charge enlarges the bremsstrahung cross section near the dust surface. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873857
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  • 2
    Electronic Resource
    Electronic Resource
    Resonant Compton scattering of photons from bound electrons in weakly coupled plasmas (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3388-3390 
    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 dense weakly plasmas are investigated. The particle interaction potential in weakly coupled plasmas is obtained by the Debye–Hückel model. The screened wave functions and energy eigenvalues for the ground and excited states of the target ion are obtained by the Ritz variation method. The nonperturbative expression for the transition matrix element near resonance is obtained by the basic lowest-order photon-perburbation Hamiltonian in the electronic dipole representation. The resonant Compton scattering cross section including the plasma screening effect is found to be greater than that neglecting the plasma screening effect. It should be noted that the plasma screening effect increases the cross section at resonance. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873577
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  • 3
    Electronic Resource
    Electronic Resource
    Antiscreening versus screening excitations for low-energy ion-ion collisions in dense plasmas using the screened hyperbolic-orbit trajectory method (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3391-3395 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma screening effects are investigated on antiscreening and screening channels for excitation of a one-electron target ion by a one-electron projectile ion in dense plasmas. In weakly coupled plasmas, the ion-ion interaction potential is given by the nonspherical Debye-Hückel model. The semiclassical screened hyperbolic-orbit trajectory method is applied to the path of the projectile ion in order to investigate the variation of the antiscreening and screening transition probabilities as functions of the impact parameter and collision energy. The results show that the antiscreening transition probability is always greater than the screening transition probability. It is found that the plasma screening effect on the antiscreening transition probability is more effective than that on the screening transition probability. The maximum position of the transition probability is getting closer to the target core with increasing projectile energy. The plasma screening effect on the antiscreening excitation cross section is also found to be stronger than that on the screening excitation cross section. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873578
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  • 4
    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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  • 5
    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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  • 6
    Electronic Resource
    Electronic Resource
    Plasma screening effects on electron–ion Coulomb bremsstrahlung in uniformly magnetized plasmas (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 3181-3184 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma screening effects are investigated on classical bremsstrahlung in electron–ion Coulomb scattering in uniformly magnetized plasmas. The calculation is for the limited case of projectile motion along the magnetic field. The electron–ion interaction potential in uniformly magnetized plasmas has been obtained by the introduction of the longitudinal plasma dielectric function. The classical straight-line trajectory method is applied to the path of the projectile electron in order to investigate the variation of the bremsstrahlung cross section as a function of the impact parameter and plasma parameters. The results shows that the bremsstrahlung cross section is increased with increasing the strength of the magnetic field. The bremsstrahlung cross section for the soft photon radiation is found to be greater than that for the hard photon radiation. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.874181
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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Semiclassical electron captures by protons from hydrogenic ions in nonideal classical plasmas (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 2685-2688 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron capture processes by protons from hydrogenic ions in nonideal classical plasmas are investigated in accordance with a semiclassical version of the Bohr–Lindhard model using the impact parameter method. The screened electron capture radius is obtained by using the effective pseudopotential model, taking into account the plasma screening effect and the collective effect. The scaled semiclassical electron capture probability is obtained as a function of the impact parameter, nonideal plasma parameter, Debye length, and projectile velocity. The nonideal plasma effect on the scaled semiclassical capture probability for the intermediate energy projectile is found to be more significant than that for the high energy projectile. The maximum position of the electron capture probability is getting close to the target ion as the nonideal plasma parameter increases. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.874111
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  • 9
    Electronic Resource
    Electronic Resource
    Landau damping effects on classical electron–ion Coulomb bremsstrahlung in dense plasmas (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 3115-3117 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Landau damping effects on the classical electron–ion Coulomb bremsstrahlung process in dense Maxwellian plasmas are investigated. The electron–ion dynamic interaction potential is obtained by introduction of the longitudinal plasma dielectric function. The classical trajectory method is applied to represent the differential bremsstrahlung radiation cross section as a function of the impact parameter, photon energy, projectile velocity, electron thermal velocity, and Debye length. The Landau damping effect in the soft photon case is found to be more important than that in the hard photon case. It is also found that the Landau damping effect is important when the projectile velocity is equal to the electron thermal velocity (vT/ve=1), for example, the Landau damping effect is about 3.4% for Ep/Ee=0.1. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1372180
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  • 10
    Electronic Resource
    Electronic Resource
    Quantum-mechanical effects on semiclassical electron captures by protons from hydrogenic ions in dense high-temperature plasmas (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 1718-1721 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Quantum-mechanical effects on the electron captures by protons from hydrogenic ions are investigated in semiclassical dense high-temperature plasmas. An effective pseudopotential model taking into account both the quantum-mechanical effects and the plasma screening effects is applied to describe the projectile–electron interactions in dense high-temperature plasmas. The semiclassical version of the Bohr–Lindhard model has been applied to obtain the electron capture radius and the electron capture probability. The impact parameter method is applied to the motion of the projectile proton in order to visualize the electron capture probability as a function of the impact parameter, thermal de Broglie wavelength, Debye length, and projectile energy. The results show that the quantum-mechanical effect reduces the electron capture cross section. It is also found that the electron capture probability significantly decreases with a slight increase of the quantum-mechanical effect through the thermal de Broglie wavelength. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1358892
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