A gas centrifuge separates uranium isotopes by spinning gaseous uranium hexafluoride (UF₆) at supersonic peripheral speeds (>300 m/s) inside an evacuated rotor casing. Centrifugal acceleration exceeding 100,000 g drives heavier ²³⁸UF₆ molecules toward the cylindrical rotor wall, leaving lighter ²³⁵UF₆ enriched along the central rotational axis.