Scan animation to accompany DECO Scan, a smart phone app, which uses your phone's camera to detect and analyze cosmic-ray muons, electrons, gamma rays, and alpha particles (helium nuclei) produced by the decay of trace amounts of radioactive elements that occur naturally in the environment and in the materials of the phone.
https://www-old.wipac.wisc.edu/deco/app
https://www-old.wipac.wisc.edu/deco/app