Microscopic theory of warm ionized gases: equation of state and kinetic Schottky anomaly

[摘要] Based on accurate Lennard-Jones type interaction potentials, we derive a closed set of state equations for the description of warm atomic gases in the presence of ionization processes. The specific heat is predicted to exhibit peaks in correspondence to single and multiple ionizations. Such kinetic analogue in atomic gases of the Schottky anomaly in solids is enhanced at intermediate and low atomic densities. The case of adiabatic compression of noble gases is analyzed in detail and the implications on sonoluminescence are discussed.

[发布机构] Dipartimento di Ingegneria Industriale, Universitá di Salerno, Via Ponte don Melillo, I-84084 Fisciano (SA), Italy^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Adiabatic compression;Equation of state;Interaction potentials;Ionization process;Lennard-Jones type;Microscopic theory;Multiple ionization;Schottky anomaly