Electron density-dependent intensity ratios of highly ionized iron lines; A comparison of theory and experiment

Journal Article · Sun Apr 01 00:00:00 EST 1984 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/184249· OSTI ID:7010369

Stratton, B C; Moos, H W; Finkenthal, M

Lines due to 2s/sup 2/2p/sup k/-2s2p/sup k//sup +1/ transitions in Fe XVIII-FeXXIII in the 80--140 A region have been observed in Printeton Large Torus tokamak plasma with electron densities of 5 x 10/sup 12/ cm/sup -3/ and 3.5 x 10/sup 13/ cm/sup -3/. These spectra strongly resemble those obtained from high-temperature regions of solar flares. The observed intensity ratios of lines of the same iron ion at the two densities are in good argeement with the published theoretical values in most cases, demonstrating that these ratios may be used to reliably determine the density in high-temperature regions of solar flares, other astrophysical plasmas and laboratory plasmas.

• Research Organization: Department of Physics, The Johns Hopkins University
• DOE Contract Number: AC02-76ET53006
• OSTI ID: 7010369
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Vol. 279:1
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
IRON IONS
ULTRAVIOLET SPECTRA
PLT DEVICES
SOLAR FLARES
ELECTRON DENSITY
ELECTRON TEMPERATURE
ENERGY-LEVEL TRANSITIONS
PLASMA
CHARGED PARTICLES
IONS
SOLAR ACTIVITY
SPECTRA
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
640104* - Astrophysics & Cosmology- Solar Phenomena
700102 - Fusion Energy- Plasma Research- Diagnostics