A device to safely perform experiments on radioactivity

摘要

This paper describes a cost effective and safe device to perform realistic experiments on the physics of radioactivity in classrooms.It can be used to study both a- and β-radioactivity as well as γ-emitters and shows extremely realistic behaviour.The device, in the form of a Geiger-Müller tube, was tested during a public lecture and it deceived many people, even physicists and teachers.