1986
DOI: 10.1007/bf00154859
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Investigation of the Mg XII 8.42 � doublet in solar flare spectra

Abstract: The intensity ratio of the components of the Mg xn 8.42 ~ (ls 2S1/2 -2p 2P1/2. 3/2) doublet in solar flare spectra has been investigated using observations recorded from the Intercosmos 7 satellite. The observed values of the ratio fall within the interval 0.38-0.66 and have been compared with recent theoretical predictions based on an optically thin collisional-radiative model. It has been found that for the flare plasma the low values of the ratio cannot be explained since they fall below the smallest theore… Show more

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Cited by 12 publications
(8 citation statements)
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“…The results of this study confirm the previous results of Sylwester et al (1986) and show that there is a persistent tendency for the intensity ratio between the components of the Mgxn doublet at 8.42 ~ to exceed 0.5, the value predicted theoretically. This is shown most clearly in the histograms of Figure 3.…”
Section: Discussionsupporting
confidence: 92%
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“…The results of this study confirm the previous results of Sylwester et al (1986) and show that there is a persistent tendency for the intensity ratio between the components of the Mgxn doublet at 8.42 ~ to exceed 0.5, the value predicted theoretically. This is shown most clearly in the histograms of Figure 3.…”
Section: Discussionsupporting
confidence: 92%
“…This is shown most clearly in the histograms of Figure 3. The explanation for these results is probably non-negligible opacity in a non-spherical source, as suggested by Sylwester et aL (1986). Because the opacity is non-zero, radiation is more likely to escape from the source in the direction along its shortest dimension, and less likely along its greatest dimension.…”
Section: Discussionmentioning
confidence: 79%
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