Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...530.1085j&link_type=abstract
The Astrophysical Journal, Volume 530, Issue 2, pp. 1085-1090.
Astronomy and Astrophysics
Astronomy
5
Atomic Processes, Plasmas
Scientific paper
Plasma screening effects are investigated on electron-ion collisional excitations in strongly coupled plasmas. Scaled cross sections for 1s-->2p0(m=0) excitation is obtained using the ion-sphere model potential with the close-encounter effects. Ground and excited bound wave functions in strongly coupled plasmas are obtained using the Ritz variation and perturbation methods. The semiclassical straight-line trajectory approximation is applied to the motion of the projectile electron in order to investigate the variation of the transition probabilities as a function of the impact parameter and ion-sphere radius. The transition probability neglecting the screening effects on the target atomic wave functions is found to be greater than that including the screening effects on the target atomic wave functions. It is shown that the target screening effects are slightly decreased with an increase of the projectile energy.
Jung Young-Dae
Yoon Jung-Sik
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