Page 97 - An Introduction to Analytical Atomic Spectrometry - L. Ebdon

Table 4.1 Ratio of excited-to ground-state atoms for lines with varying excitation energies at increasing temperature.
Ratio of excited- to ground-state atoms
Element Line g /g 0 E (J) 2000 K 3000 K 4000 K 5000 K 6000 K 7000 K
1
j
(nm)
Cs 852.1 2 2.34 x10 -19 4.19 x10 -4 7.06 x10 -3 2.90 x10 6.75 x10 1.19 x10 1.78 x10
-1
-2
-2
Na 589.1 2 3.38 x10 -19 9.65 x10 -6 5.71 x10 -4 4.39 x10 1.49 x10 3.38 x10 6.05 x10
-2
-2
-3
Ca 422.7 3 4.66 x10 -19 1.40 x10 -7 3.88 x10 -5 6.47 x10 3.50 x10 1.08 x10 2.41 x10
-3
-2
-4
Zn 213.9 3 9.13 x10 -19 1.30 x10 -14 7.99 x10 -10 1.98 x10 5.40 x10 4.90 x10 -5 2.36 x10
-7
-6