Under the excitation with 253nm UV light, U4+ ions doded in Th(PO3)4 matrix emit a series of wide bands of violet fluorescence, which belong to 6d-5f electronic transition of activated U4+ ion.

• 在近紫外光激发下；Th(PO_3)_4:U~(4+)产生一组荧光；对应于U~(4+)离子的6d-5f电子跃迁.