CAJ | 학술논문

应用自恰变分自由能模型描述了在化学平衡下,H2,H,H+,e构成地混合物在天体物理和高压实验中遇到情形下的各种相互作用及压力与温度效应引起地离解和电离现象.目前的模型预测了在压力电离区存在一热力学不稳定状态,当温度Tc=15.5 kK,压力Pc=58.3 GPa和密度ρc=0.3226 g/cm3时发生等离子体相变,此理论预测结果与各种模型计算结果进行了比较分析.
응용자흡변분자유능모형묘술료재화학평형하,H2,H,H+,e구성지혼합물재천체물리화고압실험중우도정형하적각충상호작용급압력여온도효응인기지리해화전리현상.목전적모형예측료재압력전리구존재일열역학불은정상태,당온도Tc=15.5 kK,압력Pc=58.3 GPa화밀도ρc=0.3226 g/cm3시발생등리자체상변,차이론예측결과여각충모형계산결과진행료비교분석.
The self-consistent fluid variational free energy model has been used to describe an interacting mixture of H2 ,H, H+ , and e in the chemical equilibrium. This general model describes the phenomena of dissociation and ionization caused by pressure and temperature effects, as encountered in astrophysical situations and high-pressure experiments. The present model is thermodynamically unstable in the pressure-ionization regime and predicts the existence of a plasmas phase transition occurs between a critical point Tc = 15.5 K, Pc = 58.3 Gpa, and ρc = 0.3226 g/cm3. In the high-density phase, complete pressure ionization is reached suddenly. Theoretical results for the critical point of the hypothetical plasma phase transition in hydrogen have been compared with the calculations of the various models.