The objective of this internship will be to analyze these different experimental data in order to frame the melting curve of iron, nickel and tantalum under shock as well as to construct a new solid phase diagram for bismuth, which appears very different from the known phase diagrams. In accordance with the commitments made by the CEA in favor of the integration of people with disabilities, this job is open to everyone. Participating in national protection, an administrative investigation is carried out for all CEA employees in order to ensure the integrity and security of the nation.