A very good interactive simulation for the teaching and learning about radioactivity is available at http://www.visualsimulations.co.uk
You will need to register with the site first, before freely downloading the simulation .msi programme. Teachers who have used this simulation have found it extreemly useful, coupled with the actual Geiger Muller tube and counter if available. This simulation is available also in the Digital Resources section of this website. Thanks to Mr Michel Spagnol who has highlighted the use of this simulation.
Posted on Jul - 05 - 2012