-ray tracks would be the starting-point of a new wiggly line like the original one. But such is not the case. We may think, then, of the
-rays as simply shaking loose electronic dust from some of the atoms through which they pass while we think of the X-rays as taking hold in some way of the negative electrons within an atom and hurling them out with enormous energy.
V. IONIZATION BY
-RAYS
But what happens to the electronic constituents of an atom when an
-particle, that is, a helium atom, shoots through it? Some of Bragg’s experiments and Wilson’s photographs show that the