Behaviour of Grüneisen Parameter at High Pressure and Temperature Inferred from Shock Compression Data

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（4）
• 页码范围: 528-530
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

A new method is proposed to calculate the Grüneisen parameter directly from the experimental Hugoniot data, without any assumption on the lattice vibrational mode of the material being studied. Compared with the three distinguishable features that support the rationality of the method. A new phenomenon that the lattice vibrational mode changes with the thermodynamic state of the solid has been first observed from the calculated results, which implies that the material parameter g, characterizing the lattice vibrational mode, is material dependent rather than a material constant.