toc1955's video: Alpha particles collisions in a cloud chamber

(Adolf Cortel, March 2018) The video and the pictures show a collection of collisions between alpha particles emitted by a Radium 226 source and N or O atoms of the molecules in the air, in a diffusion cloud chamber. Since, these collisions are not frequent, and a video recording about 1 hour long shows only around a dozen of these events, it has been edited and cut to shown only the events. Almost all of them are elastic collisions (Rutherford Scattering) but, because of the long range and the big angle of one of the particles seen after one or two of the events shown, it is possible that they could correspond to the nuclear reaction alpha+ N == proton+ oxigen instead of an elastic collision. Thanks to Lluis Nadal for the Radium source. I have borrowed the music (educative purpose, of course I don't own the rigths) from Sur Sudha, the great nepali group