Accession Number : AD0621196

Title :   HELIUM EMISSION OF THE CHROMOSPHERIC FLARE OF SEPTEMBER 14, 1958,

Corporate Author : SACRAMENTO PEAK OBSERVATORY SUNSPOT N MEX

Personal Author(s) : Steshenjo,N. V. ; Khokhlova,V. L.

Report Date : 1965

Pagination or Media Count : 10

Abstract : The emission lines wavelengths 3965, 5016, 6678, 5876 and 4713 were studied in a flare on the disk. With the exception of wavelength 5876, the above He I lines have no self-absorption. The intensities of optically thin lines were used for the determination of the population of the upper levels of the corresponding transitions and the estimation of the upper limit of population of the lower levels of these transitions. The outer absorbing layer projected on the flare and the self-absorption in the flare were taken into account when interpreting the profile of the D3 line and calculating the population of the 2(3)P and 3(3)D levels. It is noted that the scattering of solar radiation cannot play a decisive role in the excitation of the higher levels of He I in the investigated flare. (Author)

Descriptors :   (*HELIUM, SOLAR ATMOSPHERE), (*SOLAR ATMOSPHERE, LINE SPECTRA), (*SOLAR FLARES, LINE SPECTRA), ATOMIC ENERGY LEVELS, EXCITATION, INTENSITY, ELECTRON TRANSITIONS, SCATTERING, ABSORPTION, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE