Table B.8
Presentation of the computed radiative transition data of Si II lines together with the relative uncertainties in f-values. An explanation of the columns is given at the end of the table. The table is published at CDS in electronic form.
| Upper | Lower | σ (cm−1) | λvacuum(nm) | A (s−1) | 𝑔f | Aresc (s−1) | 𝑔fresc | u(f)/f |
|---|---|---|---|---|---|---|---|---|
 |
3s25d 2D5/2 | 1365.43 | 7323.7 | 4.680E+05 | 3.085E+00 | 4.864E+05 | 3.125E+00 | 0.068 |
 |
3s25d 2D5/2 | 1365.6 | 7322.8 | 3.119E+04 | 1.542E-01 | 3.243E+04 | 1.562E-01 | 0.068 |
 |
3s25d 2D3/2 | 1365.76 | 7321.9 | 4.373E+05 | 2.160E+00 | 4.538E+05 | 2.187E+00 | 0.068 |
| 3s26d 2D3/2 |  |
1544.48 | 6474.6711* | 3.617E+01 | 9.120E-05 | 3.634E+01 | 9.135E-05 | 0.092 |
| 3s26d 2D5/2 |  |
1544.55 | 6474.3777* | 2.181E+02 | 8.245E-04 | 2.192E+02 | 8.259E-04 | 0.086 |
 |
3s25d 2D3/2 | 1567.52 | 6379.5 | 1.000E+06 | 1.237E+00 | 1.020E+06 | 1.245E+00 | 0.061 |
 |
3s25d 2D5/2 | 1582.0 | 6321.1 | 9.225E+05 | 2.243E+00 | 9.438E+05 | 2.260E+00 | 0.060 |
 |
3s25d 2D3/2 | 1582.2 | 6320.5 | 1.026E+05 | 2.493E-01 | 1.048E+05 | 2.511E-01 | 0.060 |
| 3s26d 2D3/2 |  |
1660.48 | 6022.355 * | 8.778E+01 | 1.921E-04 | 8.865E+01 | 1.927E-04 | 0.084 |
 |
3s23d 2D3/2 | 1852.8 | 5397.1 | 7.769E+04 | 8.456E-02 | 1.082E+05 | 9.444E-02 | 0.146 |
| ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ |
Notes. Columns 1 and 2: Level designations of upper and lower levels. Column 3: Transition energy in cm 1. Column 4: Wavelength in nm. Wavelength and wavenumber values are from the NIST database (Kramida et al. 2022), when available. Wavelengths marked with * are the Ritz wavelengths calculated from the energy differences; these transitions are not identified in the NIST database. Column 5: Calculated transition rates A in s−1. Column 6: Calculated weighted oscillator strengths. Column 7: Calculated transition rates A in s−1 scaled according to experimental energy differences. Column 8: Calculated weighted oscillator strengths scaled according to experimental energy differences. Column 9: Estimated uncertainties based on the expression u(f)/f = (Al − Av)/ max(Al, Av), where Al and Av are the transition rates in length and velocity forms (Ekman et al. 2014). Uncertainties were rounded to three decimals. The large uncertainties in some of the oscillator strengths are, in general, due to the difficulties in calculating the two-electron transitions or intercombination lines.
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