Shock induced polymorphic transition and melting of tin up to 53 GPa (experimental study and modelling)

To investigate shock behavior of tin, particularly beta-bct polymorphic tra nsition and melting, shock compression measurements have been carried out u p to 53 GPa peak stress. Interface velocity measurements between tin target and LiF window have been recorded using VISAR measurement technique. Inter face velocity profiles show not only direct and reverse polymorphic beta-bc t transition but also melting of tin on release for shock pressure above 34 GPa. In order to determine phase diagram of tin an analytic method of the experimental results has been developped. The equation of state of tin deve lopped as part of this study has been implemented in a ID wave propagation lagrangian code. Experimental results and calculations obtained with this m odel of tin are in good agreement.