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) | ||
|
|
||||||||
| Kr+ | 1b | 1.325(–9) | 0.7589 | 2.544(–2) | 1.404(6) | 0.3345 | 2.594(6) | ... |
| 2c | 4.239(–11) | 0.5384 | 2.527 | 4.406(143) | 0.2391 | 6.021(1) | 1.0(3) | |
| Kr2+ | 1 | 6.988(–11) | 0.7335 | 5.226(1) | 5.218(5) | 0.7838 | 2.467(6) | 2.0(5) |
| 2 | 1.561(–11) | 1.1179 | 1.574(2) | 1.959(5) | 1.0651 | 2.382(6) | 8.0(4) | |
| 3 | 1.148(–11) | 1.1463 | 2.707(2) | 1.892(5) | 1.1620 | 2.364(6) | 8.0(4) | |
| 4 | 5.245(–12) | 1.2541 | 9.039(2) | 1.791(5) | 1.4433 | 2.345(6) | 8.0(4) | |
| 5 | 3.382(–11) | 1.0954 | 1.502(1) | 2.904(5) | 0.7487 | 2.433(6) | 8.0(4) | |
| Kr3+ | 1 | 9.239(–11) | 0.5956 | 1.311(2) | 9.717(5) | 0.8172 | 2.519(6) | 9.0(4) |
| 2 | 3.295(–11) | 1.0865 | 3.924(1) | 3.750(5) | 0.8407 | 2.350(6) | 9.0(4) | |
| 3 | 3.261(–11) | 1.0860 | 3.881(1) | 3.756(5) | 0.8409 | 2.356(6) | 9.0(4) | |
| 4 | 3.501(–11) | 1.0727 | 2.409(1) | 4.613(5) | 0.7792 | 2.314(6) | 9.0(4) | |
| 5 | 8.822(–11) | 1.0328 | 4.088 | 6.267(5) | 0.6287 | 2.527(6) | 9.0(4) | |
| Kr4+ | 1 | 2.270(–11) | 0.0035 | 4.273(3) | 9.944(7) | 0.7085 | 1.294(6) | ... |
| 2d | 4.956(–11) | 0.8138 | 2.308(2) | 8.365(5) | 0.8931 | 2.473(6) | 8.0(4) | |
| 3d | 4.893(–11) | 0.8718 | 1.507(2) | 8.743(5) | 0.8371 | 2.459(6) | 8.0(4) | |
| 4d | 3.185(–11) | 0.8859 | 1.474(2) | 1.756(6) | 0.7258 | 2.327(6) | 8.0(4) | |
| 5d | 6.490(–13) | 0.0000 | 1.344(5) | 1.892(7) | 1.6771 | 9.587(5) | ... | |
| Kr5+ | 1 | 4.740(–11) | 0.1253 | 2.425(3) | 1.173(8) | 0.5711 | 1.247(6) | ... |
| 2b | 3.434(–12) | 0.0000 | 5.369(4) | 5.256(7) | 1.0250 | 1.084(6) | ... | |
| Kr6+ | 1 | 1.132(–10) | 0.2910 | 1.024(3) | 1.111(8) | 0.4065 | 1.320(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 from Eqs. (1) and (2) are accurate over the entire temperature range (101−107)z2 K. The notation x(y) denotes x × 10y.
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