Semiclassical transition probabilities for the electron-impact excitation of hydrogenic ions in dense plasmas

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871440· OSTI ID:164978

Jung, Y ^[1]

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1. Department of Physics, Hanyang University, Ansan, Kyunggi-Do 425-791 (Korea, Republic of)

Plasma-screening effects are investigated on semiclassical transition probabilities for electron-impact excitation of hydrogenic ions in dense plasmas. The electron--ion interaction potential is obtained by a nonspherical Debye--Hueckel model of the screened Coulomb interaction for the interesting domain of the Debye length {Lambda}/{ital a}{sub {ital Z}}{ge}10. Semiclassical straight-line trajectory method is used to describe the behavior of the projectile electron. The screening effect is increased with increasing the projectile energy. The plasma-screening effect on the optically allowed (dipole) transition (1{ital s}{r_arrow}2{ital p}) is found to be more effective than that on the optically forbidden transition (1{ital s}{r_arrow}2{ital s}). For 1{ital s}{r_arrow}2{ital s} transition, the maximum position of the transition probability is almost unchanged with increasing or decreasing the projectile energy and plasma-screening effect. However, for 1{ital s}{r_arrow}2{ital p} transition, the maximum position of the transition probability has receded from the nucleus as the projectile energy increases. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 164978
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DEBYE LENGTH
ELECTRON COOLING
ELECTRON-ION COLLISIONS
EXCITED STATES
FORM FACTORS
HYDROGEN IONS
SCREENING
SEMICLASSICAL APPROXIMATION