X-ray lines of helium-like oxygen and neon in the solar corona

Technical Report · Thu Sep 30 04:00:00 EDT 1982

OSTI ID:6337392

McKenzie, D L; Landecker, P B

Line ratios from the helium-like ions O VII and Ne IX are useful as plasma diagnostics for both flaring and nonflaring solar coronal active regions. R sub o (low density limit of R (photon flux ratio of fabrication line) uncertainties are especially important for nonflaring plasmas. We analyzed 29 nonflare solar X-ray spectra, each a sum of approx. 10 scans by the SOLEX B spectrometer on the U.S.A.F. p78-1 satellite, to conclude that R sub o is in the range 3.7-4.1. In the relatively few flares we have analyzed we find no evidence of a departure from ionization equilibrium.

• Research Organization: Aerospace Corp., El Segundo, CA (USA). Space Sciences Lab.
• OSTI ID: 6337392
• Report Number(s): AD-A-121438/6
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
CHEMICAL COMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
HELIUM IONS
IONIZING RADIATIONS
IONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NEON IONS
OXYGEN IONS
PHOTONS
RADIATIONS
RESONANCE
SOLAR ACTIVITY
SOLAR CORONA
SOLAR FLARES
SPECTROMETERS
X RADIATION