Article

Thermophysical Properties of Materials
2008. V. 46. № 1. P. 53–59
Zakcharova O.D., Semenov A.M.
The second group integral of cesium
Annotation
The literature data on the interaction of two cesium atoms, obtained by processing the results of spectroscopic experiments and quantum-mechanical calculations, are used to calculate the second group integral of cesium at temperatures from 700 to 3000 K. The contributions made by atoms in the ground $^2S$ and first excited $^2P$ electronic states are taken into account. The contribution by the excited state is negligible at 1000 K, approximately 2 % at 2000 K, and as significant as 20 % at 3000 K. The error of calculation results is estimated to range from 0.3 % at the lowest temperatures to 10 % at the highest temperatures.
Article reference:
Zakcharova O.D., Semenov A.M. The second group integral of cesium, High Temp., 2008. V. 46. № 1. P. 53