If a packet of isomass ions is accelerated through the same potential difference, the ions will achieve an equal velocity and arrive at the detector with a time spread corresponding to their initial spatial distribution in the direction of the flight tube.
Source: wiktionary
In Fig. 4 the isomass lines of equal mâ‚‘â‚‘ in the oscillation parameter space are shown, together with various bounds from existing and future reactor and accelerator oscillation experiments.
Source: wiktionary
Values of square root of area and mass/area of isomass lines for the Etna 1998 tephra deposit.
Source: wiktionary