Electronic effects in dense, hot fluids due to intrinsic positive molecular ions: Applications to Cs, Rb, and Hg

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Abstract
The role played by thermally generated positive molecular ions in the density dependence of the electronic properties of hot, dense fluids is examined. It is shown that the cohesion within such ions dominates the density dependence of the activation energy for electronic conduction in fluids such as Cs, Rb, and Hg. The model is shown to account for the observed electrical conductivity in the insulating regime. Also, the evolution to semimetallic behavior with increasing atomic density is obtained correctly.