Extended Data Fig. 4: Examples of sample temperature during levitation and laser beam heating.
a, Emissivity-corrected temperature measurements (10 Hz acquisition) from the optical pyrometer for PuO2−x solid heated under 5% CO (Ar balance). Laser power was increased incrementally, interspersed with X-ray diffraction measurements taken while the sample was held isothermally. b, Zoomed-in view of a single isotherm from (a). For the time period 364–416 s, the temperature mean was 2140 K with a standard deviation of 71 K. c, Temperature of molten PuO1.57 during a different heating run than (a-b). X-ray measurements were analyzed for the time period 105–110 s, which had a temperature mean of 2730 K and a standard deviation of 2 K.
