English: This diagram demonstrates the constitution of different kinds of ionizing radiation and their ability to penetrate matter.
Alpha particles are stopped by a sheet of paper whilst beta particles halt to an Tin foil. Gamma radiation is dampened when it penetrates matter. Gamma rays can be stopped from 4 meters of lead. Tungsten and tungsten alloys can stop Gamma radiation with much less mass than lead
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(Reusing this file)
Original in public domain, this version own work