Table 5
Fit coefficients for radiative recombination rate coefficients at low temperature (see Eqs. (1) and (2)).
| Target | A | B | T 0 | T 1 | C | T 2 | T max | |
| Iona | Level | (cm3 s-1) | (K) | (K) | (K) | (K) | ||
|
|
||||||||
| Se+ | 1b | 7.395(–10) | 0.7288 | 7.273(–2) | 3.495(6) | 0.3306 | 2.160(6) | ... |
| 2 | 2.808(–11) | 0.4980 | 3.761 | 3.415(129) | 0.3365 | 4.621(1) | 2.0(3) | |
| 3 | 2.747(–11) | 0.4818 | 3.926 | 2.747(111) | 0.3515 | 4.451(1) | 2.0(3) | |
| 4c | 1.439(–11) | 0.0535 | 2.036(1) | 6.815(130) | 0.7152 | 4.065(1) | 2.0(3) | |
| 5d | 3.719(–11) | 0.4765 | 3.786 | 3.019(101) | 0.2935 | 6.541(1) | 1.0(3) | |
| Se2+ | 1 | 6.253(–11) | 0.6744 | 6.081(1) | 5.440(5) | 0.8633 | 2.232(6) | 8.0(4) |
| 2 | 3.804(–12) | 0.5422 | 7.174(3) | 3.930(6) | 1.3093 | 1.915(5) | 8.0(4) | |
| 3 | 2.977(–11) | 1.0695 | 3.398(1) | 1.907(5) | 0.9534 | 2.179(6) | 8.0(4) | |
| 4 | 1.358(–11) | 1.1128 | 7.719(1) | 2.460(5) | 1.0094 | 2.152(6) | 8.0(4) | |
| 5 | 2.109(–11) | 1.0811 | 2.623(1) | 2.879(5) | 0.8678 | 2.142(6) | 8.0(4) | |
| Se3+ | 1e | 1.496(–11) | 0.0000 | 3.270(3) | 9.004(7) | 0.7282 | 1.394(6) | ... |
| 2 | 5.353(–11) | 0.9825 | 5.028(1) | 6.721(5) | 1.0127 | 4.915(5) | 9.0(5) | |
| Se4+ | 1 | 2.664(–11) | 0.0000 | 3.018(3) | 1.142(8) | 0.6892 | 1.136(6) | ... |
| Se5+ | 1 | 5.822(–11) | 0.1471 | 1.562(3) | 1.905(8) | 0.5119 | 1.031(6) | ... |
| Se6+ | 1 | 1.293(–10) | 0.3096 | 8.107(2) | 2.554(8) | 0.3114 | 1.278(6) | ... |
Notes. Tmax represents the maximum temperature for which these fits are valid to within the stated accuracies (5%, unless noted). For recombination at temperatures exceeding Tmax, the fits from Eq. (3) and coefficients listed in Table 6 should be used. If no Tmax is given, then the fits are accurate over the entire temperature range (101−107)z2 K. The notation x(y) denotes x × 10y.
The fit is accurate to within 5% except at the lowest temperature (10 K), where it is accurate to within 7%.
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