Parameters and results of the linear fitting of the data presented in Fig. S2 and S3.

	Temperature [°C]	D 0 [nm]	n	k [nm4 h−1]	R 2
NpO2	950	20.1	4	127 243(4952)	0.99
	1050	41.8	4	2 319 034(51 642)	0.99
	1150	105.9	4	57 871 100(1 661 392)	0.99
UO2	650	6.2	4	288(13)	0.98
	700	6.4	4	788(28)	0.99
	800	9.0	4	45 438(177)	0.99
	900	25.2	4	288 485(1130)	0.99
	1000	34.4	4	835 046(64 084)	0.94