Radioactivity is the by-product of the decay of atomic nucleus and takes the form of ionizing radiations. There are 3 main kinds of radioactive radiations (α, β and γ and a few others including electronic capture) and each kind leaves a specific signature inside the cloud chamber. So, it’s possible to observe and measure different parameters which characterizes the radioactive products (activity, kind of radionuclide, half-life, penetration and energy of the radiations)
Why are those pages in (rough) English ?
Well, radioactivity doesn't give a sh...t about borders so pages about this topic shouldn't be restricted to French viewers, hence English, the international language.
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