• Keine Ergebnisse gefunden

Oscillatory Screening Effects on Elastic Collisions in Dense Electron-Ion Quantum Plasmas

N/A
N/A
Info
Herunterladen
Protected

Academic year: 2022

Aktie "Oscillatory Screening Effects on Elastic Collisions in Dense Electron-Ion Quantum Plasmas"

Copied!
1
0
0

Wird geladen.... (Jetzt Volltext ansehen)

Jetzt herunterladen ( 1 Seite )

Volltext

(1)

Oscillatory Screening Effects on Elastic Collisions in Dense Electron-Ion Quantum Plasmas

Yo-Han Kooaand Young-Dae Junga,b

aDepartment of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791, South Korea

bAtomic and Molecular Data Research Center, National Institute for Fusion Science, Toki, Gifu, 509-5292, Japan

Reprint requests to Y.-D. J.; E-mail: ydjung@hanyang.ac.kr

Z. Naturforsch.64a,237 – 241 (2009); received April 4, 2008 / revised September 15, 2008 The oscillatory screening effects on elastic electron-ion collisions are investigated in dense quan- tum plasmas. The eikonal method with the modified Debye-H¨uckel potential is employed to obtain the scattering phase shift and scattering amplitude. In addition, the total elastic collision cross section is obtained by the optical theorem with the forward scattering amplitude in quantum plasmas. It is shown that the modified Debye-H¨uckel screening in quantum plasmas produces the oscillatory be- haviour of the scattering phase shift. In addition, the minimum position of the phase shift is receded from the target ion with decreasing the quantum wave number. It is also found that the oscillatory screening effect suppresses the differential cross section. The total cross section is also found to be decreased due to the oscillatory screening effect. In addition, it is shown that the total cross section decreases with an increase of the quantum wave number.

Key words:Oscillatory Screening; Quantum Plasmas.

Referenzen

Jetzt herunterladen ( PDF - 1 Seite - 22.83 KB )

ÄHNLICHE DOKUMENTE

Dynamics of Paired-Solitons in Quantum Electron Plasmas

In summary, we have shown the existence of new localized nonlinear structures for the electrostatic po- tential and the electron density in the form of bright and W-shaped solitons

Nonthermal and Plasmon Effects on Elastic Electron-Ion Collisions in Hot Quantum Lorentzian Plasmas

The modified interaction model taking into account the nonthermal screen- ing and plasmon effects is employed to represent the electron-ion interaction potential in hot

Nonthermal and Plasmon Effects on Elastic Electron-Ion Collisions in Hot Quantum Lorentzian Plasmas

Thus, in the present paper we investigate the non- thermal and plasmon effects on the elastic electron- ion collision in hot quantum Lorentzian plasmas. The modified interaction

Effects of Grain Size on the Bremsstrahlung Spectrum of Electron-Dust Grain Collisions in Dusty Plasmas

Using the Born approximation for the initial and final states of the projectile electron, the bremsstranhlung radiation cross section is obtained as a function of the grain size,

Effects of Grain Size on the Bremsstrahlung Spectrum of Electron-Dust Grain Collisions in Dusty Plasmas

Hence, we have found that the grain size effect plays a significant role in the electron-dust grain bremsstrahlung process in dusty plasmas containing highly charged dusty

Oscillatory Screening Effects on Elastic Collisions in Dense Electron-Ion Quantum Plasmas

Fig- ure 1 represents the comparison between the scatter- ing phase shifts ζ obtained by the modified Debye- H¨uckel screening and by the standard Debye-H¨uckel screening as a

Effects of Ions on the Propagation of Langmuir Oscillations in Cold Quantum Electron-Ion Plasmas

It is shown that the higher and lower frequency modes of the Langmuir oscilla- tions would propagate in cold quantum plasmas according to the effects of ions.. It is also shown

Quantum Electron-Ion Plasmas

In addition, it is shown that the phase velocity of the lower fre- quency mode is saturated with increasing the quantum wavelength and further that the group velocity of the