In the nuclear age, a radiation detector, and an app to run it are within your reach Take one empty box of Frisk mints, some aluminum foil or a copper coin, eight photodiodes and free assembly ...

Various radioactive objects can be examined using a Geiger counter. Paper, aluminum foil, aluminum plate, and lead plate can be used to block emissions from the objects. Place the source on the bench.

One thing a radioactive world needs is a good “atom-sized” Geiger counter. Last week the University of Chicago proudly displayed a handy, hip-pocket model. The new gadget is so easy to read that ...

Description: A geiger counter and a selection of radioactive sources. Available sources are: Thallium 204 (beta); Strontium 90 (beta); Cobalt 60 (gamma); Coleman propane lamp mantle containing ...