Abstract
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 2 S and first excited 2 P 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.
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Original Russian Text © O.D. Zakharova, A.M. Semenov, 2008, published in Teplofizika Vysokikh Temperatur, Vol. 46, No. 1, 2008, pp. 59–65.