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Table 3

Adopted ionisation energies χion and partition functions U(T) for the relevant ionisation stages of the heavy elements.

Species Eion (eV) U(T)
3000 K 5000 K 8000 K 12 000 K
Cu i 7.726 2.04 2.34 3.23 5.63
Cu ii 20.290 1.01 1.03 1.33 2.23
Zn i 9.394 1.00 1.01 1.01 1.35
Zn ii 17.960 2.00 2.00 2.00 2.02
Ga i 5.999 4.70 5.12 5.65 8.15
Ga ii 20.520 1.00 1.00 1.00 1.03
Ge i 7.899 6.03 7.61 9.01 12.29
Ge ii 15.940 3.71 4.41 4.90 5.27
Rb i 4.177 1.99 2.25 4.26 11.85
Rb ii 27.290 1.00 1.00 1.00 1.00
Sr i 5.695 1.01 1.24 3.01 19.84
Sr ii 11.030 2.00 2.15 2.78 4.26
Y i 6.217 8.84 11.76 20.43 37.35
Y ii 12.220 10.94 15.79 22.54 31.80
Zr i 6.634 19.93 32.50 55.44 89.33
Zr ii 13.130 29.14 45.59 67.79 96.11
Nb i 6.579 34.95 52.93 93.16 192.18
Nb ii 14.320 26.20 43.07 71.77 114.13
Mo i 7.092 7.12 9.05 19.54 56.94
Mo ii 16.160 6.03 7.72 15.75 38.08
Ru i 7.361 22.45 34.02 56.98 97.48
Ru ii 16.760 15.99 23.97 36.74 58.12
Rh i 7.459 18.66 26.51 38.86 58.73
Rh ii 18.080 11.77 15.50 21.00 30.21
Pd i 8.337 1.53 2.94 5.74 10.30
Pd ii 19.430 6.68 7.51 8.50 10.52
Ag i 7.576 1.96 1.96 2.05 3.42
Ag ii 21.490 0.98 1.00 1.03 1.16
In i 5.786 3.46 4.23 5.42 12.28
In ii 18.870 1.00 1.00 1.01 1.05
Sn i 7.344 3.36 5.14 7.07 9.33
Sn ii 14.630 2.57 3.13 3.83 4.42
Ba i 5.212 1.22 2.55 8.35 29.87
Ba ii 10.000 2.78 4.17 5.97 7.95
La i 5.577 14.29 27.04 58.19 126.50
La ii 11.100 20.23 29.25 42.52 62.91
Ce i 5.539 75.34 190.04 471.79 998.10
Ce ii 10.800 81.74 189.36 369.03 604.79
Pr i 5.473 37.48 115.76 333.07 717.89
Species Eion (eV) U(T)
3000 K 5000 K 8000 K 12 000 K
Pr ii 10.600 55.98 138.35 318.42 585.87
Nd i 5.525 30.35 92.55 322.69 828.45
Nd ii 10.700 49.58 120.48 315.29 705.33
Sm i 5.644 18.22 38.24 108.47 299.28
Sm ii 11.100 31.27 59.16 120.02 243.16
Eu i 5.670 8.16 10.97 28.31 103.98
Eu ii 11.240 12.49 15.87 23.96 42.00
Gd i 6.150 34.56 59.41 135.19 318.79
Gd ii 12.100 48.42 83.38 146.39 249.09
Tb i 5.864 90.06 165.84 348.95 703.54
Tb ii 11.500 53.44 102.16 181.93 293.33
Dy i 5.939 20.94 41.18 137.28 441.21
Dy ii 11.700 33.55 54.46 127.72 320.92
Ho i 6.022 18.57 34.40 96.02 261.06
Ho ii 11.800 31.09 49.39 131.82 424.08
Er i 6.108 16.14 32.36 102.58 318.00
Er ii 11.900 26.97 42.14 90.26 204.14
Tm i 6.184 7.95 10.60 28.30 106.31
Tm ii 12.100 15.42 17.79 31.30 76.72
Yb i 6.254 0.94 1.02 2.33 9.85
Yb ii 12.180 2.01 2.00 3.04 8.23
Lu i 5.426 6.69 8.70 14.05 29.32
Lu ii 13.900 1.02 1.40 2.79 5.91
Hf i 6.825 9.07 14.60 27.72 58.17
Hf ii 14.900 6.91 12.63 22.14 38.13
W i 7.864 6.25 12.72 28.41 68.89
W ii 17.700 6.95 13.84 29.34 60.05
Os i 8.438 12.99 20.01 36.56 71.82
Os ii 18.500 12.12 18.01 27.13 40.49
Ir i 8.967 14.50 21.10 33.66 57.06
Ir ii 17.000 16.46 22.92 34.68 53.96
Au i 9.226 2.10 2.46 3.27 4.72
Au ii 20.500 0.81 1.12 1.80 3.17
Tl i 6.108 2.00 2.29 2.95 5.40
Tl ii 20.430 1.00 1.00 1.01 1.02
Pb i 7.417 1.11 1.54 2.70 7.13
Pb ii 15.030 2.00 2.10 2.33 2.75
Th i 6.307 11.19 27.29 81.41 221.47
Th ii 11.900 14.73 35.99 88.25 187.33

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