Fig. 3

Temporal changes in secondary ion images of ¹²C^-, ³¹P^-, and ⁹⁸Mo¹⁶O^- of Target 1 acquired in PMo mode. The images were generated by dividing a total of 800 frames into stacks of 160 frames each, creating 5 temporal image series. Consistent with the major ¹²C^- signal, ³¹P^- and ⁹⁸Mo¹⁶O^- counts start weakly or assimilate from the surroundings, gradually intensify around the midpoint of the frame sequence, and then diminish towards the end of the images. The numbers on the upper left side of each image indicate the stacked frames used to create those images. Scale bars are 5 μm.