非平衡セシウムプラズマに対する衝突-放射モデル

Abstract

Macroscopic natures of the non-equilibrium cesium plasma are deccribed by a collisional-radiative model, in which the excited atoms play a substantial role. Up to this time, only the resonance state 6P has been considered for the excited state in the collisional-radiative model because the probability of the excitation to the resonance state is very high in comparision with that to the other states. In the present work, the collisional-radiative model including seven excited states is considered ana it is shown how the inclusion of the excited state other than the resonance one leads to a satisfactory description for the plasma properties. It is confirmed that the number of the excited state should be increased as the temperature and the pressure decrease.