Table 3
List of the strongest Si iii lines.
| i–j | Levels | I | I | gf | Aji(s-1) | Aji(s-1) | Aji(s-1) | λexp(Å) | |
|
|
|||||||||
| CHIANTI | Present | CHIANTI | N86 | ||||||
|
|
|||||||||
| 1–5 | 3s21S0–3s 3p 1P1 | 1.0 | 1.0 | 1.68 | 2.6 × 109 | 2.7 × 109 | 2.6 × 109 | 1206.50 | |
| 1–3 | 3s21S0–3s 3p 3P1 | 0.67(0.69) | 0.50 | 1.8 × 10-5 | 1.1(1.67) × 104 | 1.5 × 104 | 1.8 × 104 | 1892.03 | |
| 5–6 | 3s 3p 1P1–3p21D2 | 6.0(5.8) × 10-2 | 5.8 × 10-2 | 0.13 | 2.6 × 107 | 2.4 × 107 | 3.1 × 107 | 2542.58 | |
| 4–12 | 3s 3p 3P2–3s 3d 3D3 | 5.1(4.9) × 10-2 | 4.5 × 10-2 | 3.75 | 2.9 × 109 | 2.8 × 109 | 2.9 × 109 | 1113.23 | |
| 4–9 | 3s 3p 3P2–3p23P2 | 4.5(4.2) × 10-2 | 3.5 × 10-2 | 2.11 | 1.7 × 109 | 1.7 × 109 | 1.7 × 109 | 1298.95 | |
| 3–11 | 3s 3p 3P1–3s 3d 3D2 | 1.7(1.5) × 10-2 | 1.4 × 10-2 | 2.02 | 2.2 × 109 | 2.1 × 109 | 2.2 × 109 | 1109.97 | |
| 3–9 | 3s 3p 3P1–3p23P2 | 1.5(1.4) × 10-2 | 1.2 × 10-2 | 0.71 | 5.6 × 108 | 5.7 × 108 | 5.6 × 108 | 1294.55 | |
| 4–8 | 3s 3p 3P2–3p23P1 | 1.5(1.4) × 10-2 | 1.1 × 10-2 | 0.70 | 9.2 × 108 | 7.7 × 108 | 9.1 × 108 | 1303.32 | |
| 2–8 | 3s 3p 3P0–3p23P1 | 1.2(1.1) × 10-2 | 9.2 × 10-3 | 0.57 | 7.5 × 108 | 7.6 × 108 | 7.5 × 108 | 1296.73 | |
| 5–16 | 3s 3p 1P1–3s 3d 1D2 | 1.1(1.1) × 10-2 | 1.4 × 10-2 | 4.97 | 4.6 × 109 | 4.6 × 109 | 4.6 × 109 | 1206.56 | |
| 2–10 | 3s 3p 3P0–3s 3d 3D1 | 9.4(8.8) × 10-3 | 7.6 × 10-3 | 0.89 | 1.6 × 109 | 1.6 × 109 | 1.6 × 109 | 1108.36 | |
| 3–8 | 3s 3p 3P1–3p23P1 | 8.9(8.4) × 10-3 | 6.9 × 10-3 | 0.42 | 5.6 × 108 | 5.7 × 108 | 5.6 × 108 | 1298.89 | |
| 3–10 | 3s 3p 3P1–3s 3d 3D1 | 7.0(6.8) × 10-3 | 5.7 × 10-3 | 0.67 | 1.2 × 109 | 1.2 × 109 | 1.2 × 109 | 1109.94 | |
| 5–15 | 3s 3p 1P1–3s 4s 1S0 | 6.8(6.6) × 10-3 | 7.4 × 10-3 | 7.6 × 10-2 | 3.0 × 108 | 2.8 × 108 | 4.0 × 108 | 1312.59 | |
| 4–13 | 3s 3p 3P2–3s 4s 3S1 | 6.2(5.9) × 10-3 | 4.3 × 10-3 | 0.57 | 1.3 × 109 | 1.3 × 109 | 1.3 × 109 | 997.39 | |
| 4–11 | 3s 3p 3P2–3s 3d 3D2 | 5.5(5.1) × 10-3 | 4.5 × 10-3 | 0.67 | 7.3 × 108 | 7.0 × 108 | 7.2 × 108 | 1113.20 | |
| 3–7 | 3s 3p 3P1–3p23P0 | 4.6(3.7) × 10-3 | 3.2 × 10-3 | 0.56 | 2.2 × 109 | 2.3 × 109 | 2.2 × 109 | 1301.15 | |
| 3–13 | 3s 3p 3P1–3s 4s 3S1 | 3.7(3.5) × 10-3 | 2.6 × 10-3 | 0.34 | 7.6 × 108 | 7.6 × 108 | 8.0 × 108 | 994.79 | |
| 5–14 | 3s 3p 1P1–3p21S0 | 2.5(2.5) × 10-3 | 1.9 × 10-3 | 0.88 | 2.9 × 109 | 3.3 × 109 | 2.8 × 109 | 1417.24 | |
| 12–19 | 3s 3d 3D3–3s 4p 3P2 | 2.4(2.3) × 10-3 | 1.4 × 10-3 | 1.09 | 1.5 × 108 | 1.6 × 108 | 1.6 × 108 | 3087.13 | |
| 6–20 | 3p21D2–3s 4p 1P1 | 1.9(1.9) × 10-3 | 1.5 × 10-3 | 0.49 | 3.3 × 108 | 3.3 × 108 | 3.0 × 108 | 1842.55 | |
| 6–27 | 3p21D2–3s 4f 1F3 | 7.6(7.5) × 10-4 | – | 2.09 | 1.4 × 109 | – | 1.7 × 109 | 1210.45 | |
Notes. The first column lists the indices of the levels, as from Table 2. The second the spectroscopic notation. Column 3 shows the relative intensities (photons) Int = NjAji/Ne of the strongest lines, relative to the resonance transition, calculated at log Ne [cm-3]=10 and log Te [K]= 4.7, using the level populations obtained with the present A-values and effective collision strengths. The values in brackets are the intensities obtained by assuming for the intercombination 1–3 line the experimental value of 1.67 × 104. Column 4 shows the relative intensities obtained with the CHIANTI v.7.1 ion model. Column 5 lists our weighted oscillator strength gf, and Col. 6 our A-values. Column 7 lists the Dufton et al. (1983)A-values as given in the CHIANTI v.7.1 database, while Col. 8 those from Nussbaumer (1986) [N86]. All experimental wavelengths (λexp, last column) are in vacuum.
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