Similarly, the TOF distributions of non-reactive O2 can be decomposed purely into IS and TDprompt components. As there are no Ar or O2 signals that persist long enough to suggest residence times beyond ~100 microseconds (the resolution of our experiment), we conclude that the signals that give rise to the long tails of the TOF distributions for O and CO are not simply the result of trapping within the three-dimensional porous network of FiberForm.