Shifts of hydrogen and ionized-helium lines from. delta. n = 0 interactions with electrons in dense plasmas

Journal Article · Thu Sep 15 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.2943· OSTI ID:6822109

Griem, H R

Shifts from electron collisions associated with dipole interactions between degenerate levels of a given principal quantum number n are evaluated following D. B. Boercker and C. A. Iglesias (Phys. Rev. A 30, 2771 (1984)). They are then used to recalculate the plasma shifts of hydrogen and ionized-helium lines from electron collisions, inhomogeneities in the ion-produced quasistatic fields, and some higher-order effects. Because of the partial cancellation of electron collisional shifts by the other effects, inclusion of the ..delta..n = 0 collisional shifts leads to an increase of calculated line shifts by a factor approx.1.5, which for Balmer lines of hydrogen and Paschen lines of ionized helium leads to markedly improved agreement with most measurements. Estimates for higher-Z members (Zgreater than or equal to4) of the one-electron isoelectronic sequence yield ..delta..n = 0, dipole contributions to the electron-collisional shifts which are much smaller than the effects of ..lambda.. = 0, penetrating monopole interactions.

• Research Organization: Laboratory for Plasma and Fusion Energy Studies, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6822109
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
74 ATOMIC AND MOLECULAR PHYSICS
BALMER LINES
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ELEMENTS
EMISSION SPECTRA
HELIUM IONS
HYDROGEN
IONS
NONMETALS
PASCHEN LINES
PLASMA
QUANTUM NUMBERS
SPECTRA
SPECTRAL SHIFT