EUV line ratios from MgVII and SiIX |
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Authors: | B N Dwivedi A K Gupta |
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Institution: | (1) Department of Applied Physics, Institute of Technology, Banaras Hindu University, 221005 Varanasi, India |
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Abstract: | Following the work of Burgess et al. (1991), the EUV line ratios from MgVII and SiIX ions have been computed using most appropriate atomic data. The density dependent line ratio R1 = (2s2p3
1D°–2s22p2
1D)/ (2s2p3
3S°–2s22p2
3P2) and R2 = (2s2p3
1p°–2s2– –2p2
1D)/ (2s2p3
3S°–2s22p2
3P2) for MgVII and SiIX are compared with the earlier results of Mason and Bhatia (1978) and Keenan et al. (1986). Electron densities derived using observed R1 and R2 ratios from skylab NRL EUV spectra of solar flares and active regions are tabulated along with the values obtained by Keenan et al. (1986). |
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Keywords: | |
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