Collisional-Radiative Recombination of Ions and Electrons in High-Pressure Plasmas in Which the Electron Temperature Exceeds the Gas Temperature

The recombination rate of electrons in a hypothetical helium-like plasma at high pressure is calculated for cases in which the gas temperature is fixed at 300°K, and the electron temperature is varied from 300 to 2000°K. Neutral collision-induced recombination and electron collision-induced recombination are considered for ranges of electron density from ${10}^8$ to ${10}^{13}$ ${\mathrm{cm}}^{-3\mathrm{}}$ and gas densities from ${10}^{16}$ to ${10}^{19}$ ${\mathrm{cm}}^{-3\mathrm{}}$. An inverse three-halves dependence of recombination coefficient on electron temperature is found for certain densities.