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Table 1

Relative intensities of the brightest soft X-ray lines in Fe xv.

ij Levels Int Int gf Aji (s-1) λexp (Å) λth (Å) New
1.0  ×  108 1.0  ×  1019

5–37 3s 3p 1P1–3s 4s 1S0 1.0 5.1  ×  10-2 0.16 2.2  ×  1011 69.66 (? CW73) 69.93 (0.3) 69.661 (K97)
14–53 3s 3d 1D2–3s 4f 1F3 0.36 2.4  ×  10-2 3.45 6.0  ×  1011 73.50 (CW73) 73.82 (0.3)
5–45 3s 3p 1P1–3s 4d 1D2 0.28 1.8  ×  10-2 0.64 2.4  ×  1011 59.404 (F72) 59.63 (0.2)
1–41 3s21S0–3s 4p 1P1 0.20 1.4  ×  10-2 0.29 2.3  ×  1011 52.911 (E36) 52.96 (0.1)
7–53 3p21D2–3s 4f 1F3 0.12 8.1  ×  10-3 0.89 2.1  ×  1011 63.96 (? CW73) 63.95 (–0.0) 63.961 (K97)
5–93 3s 3p 1P1–3s 5s 1S0 7.6  ×  10-2 3.9  ×  10-3 4.5  ×  10-2 1.4  ×  1011 46.28 ? 46.30 (bl)
13–52 3s 3d 3D3–3s 4f 3F4 6.2  ×  10-2 8.0  ×  10-2 5.81 8.7  ×  1011 70.054 (E36) 70.17 (0.1)
5–113 3s 3p 1P1–3s 5d 1D2 4.6  ×  10-2 3.0  ×  10-3 0.27 1.8  ×  1011 43.78 ? 43.75 (bl)
12–51 3s 3d 3D2–3s 4f 3F3 4.2  ×  10-2 5.5  ×  10-2 4.01 7.8  ×  1011 69.987 (E36) 70.11 (0.1)
11–50 3s 3d 3D1–3s 4f 3F2 3.3  ×  10-2 3.7  ×  10-2 2.70 7.3  ×  1011 69.945 (E36) 70.07 (0.1)
4–44 3s 3p 3P2–3s 4d 3D3 3.2  ×  10-2 4.3  ×  10-2 1.43 4.3  ×  1011 56.200 (E36) 56.22 (0.0)
7–41 3p21D2–3s 4p 1P1 3.1  ×  10-2 2.2  ×  10-3 9.3  ×  10-2 3.6  ×  1010 75.167 (E36) 75.31 (0.1)
14–117 3s 3d 1D2–3s 5f 1F3 2.9  ×  10-2 2.2  ×  10-3 0.60 2.1  ×  1011 52.35 ? 52.36
13–40 3s 3d 3D3–3s 4p 3P2 2.8  ×  10-2 8.0  ×  10-2 0.30 5.7  ×  1010 82.98 ? 82.750 (K97)
1–39 3s21S0–3s 4p 3P1 2.6  ×  10-2 3.4  ×  10-2 0.12 9.2  ×  1010 53.17 ? 53.11 (bl)

Notes. The relative line intensities (photons) Int = NjAji/Ne were calculated at log Ne [cm-3]  = 8,19 and log Te [K]  = 6.3. The lines are ordered with decreasing intensity. The oscillator strengths and transition probabilities are shown. The last three columns show the experimental wavelengths λexp(Å), when known, the target wavelengths λth(Å), with their difference in parenthesis, and finally the new wavelengths proposed here. We also add next to the experimental wavelength the reference (E36: Edlén 1936a; F72: Fawcett et al. 1972; CW73: Cowan & Widing 1973). A question mark indicates a tentative identification.

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