Electron impact excitation of Mg VIII - Collision strengths, transition probabilities and theoretical EUV and soft X-ray line intensities for Mg VIII

M. F. R. Grieve; C. A. Ramsbottom; F. P. Keenan

doi:10.1051/0004-6361/201321594

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Volume 556 (August 2013)

A&A, 556 (2013) A24

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Table 5

Theoretical soft X-ray emission lines of Mg viii.

		Electron density (cm^-3)
Transition	Wavelength (Å)	10⁸	10⁹	10¹⁰

2s²2p ²P_1/2–2s2p3p ²D_3/2	69.42^a	0.08	0.06	0.05
2s²2p ²P_3/2–2s2p3p ²D_5/2	69.47^a	0.10	0.10	0.10
2s²2p ²P_1/2–2s²3d ²D_3/2	74.86^a^,^b	0.79	0.57	0.55
2s²2p ²P_3/2–2s²3d ²D_5/2	75.03^a,b	1.00	1.00	1.00
2s²2p ²P_3/2–2s²3d ²D_3/2	75.04^a,b	0.16	0.12	0.11
2s2p²²D_5/2–2s2p3d ²F_7/2	78.45	0.13	0.13	0.13
2s2p²²D_3/2–2s2p3d ²F_5/2	78.57	0.13	0.10	0.09
2s2p²²D_5/2–2s2p3d ²D_5/2	80.23^a	0.06	0.05	0.05
2s2p²²D_3/2–2s2p3d ²D_3/2	80.25^a	0.05	0.04	0.04
2s2p²⁴P_5/2–2s2p3s ⁴P_5/2	81.84^a	0.05	0.05	0.05
2s²2p ²P_3/2–2s²3s ²S_1/2	82.82^a	0.24	0.21	0.20
2s2p²²D_5/2–2s2p3s ²P_3/2	86.84^a	0.24	0.25	0.25
2s2p²²D_3/2–2s2p3s ²P_1/2	87.02^a	0.23	0.15	0.14
2s2p²²S_1/2–2s2p3s ²P_3/2	92.13^a	0.08	0.08	0.08
2s2p²²S_1/2–2s2p3s ²P_1/2	92.32^a	0.07	0.05	0.05
2s2p²²D_5/2–2s²3p ²P_3/2	96.79	0.29	0.27	0.27
2s2p²²D_3/2–2s²3p ²P_1/2	96.87	0.21	0.15	0.15

Notes.Intensities listed relative to I(75.03 Å).

^(a)

Lines identified in the Chandra spectra of Procyon and α Cen A+B by Raassen et al. (2002) and Werner & Drake (2005).

^(b)

Lines identified in solar spectra by Behring et al. (1972), Malinovsky & Heroux (1973) and Acton et al. (1985).

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