Radiation detector

Had a bunch of empty coffie cans that i wanted to use for something. I found this article about using coffiee cans for ion chamber radiation detectors.
I did not have the parts they suggested so i used whateve i had:

The detector turned out to be extremely sensitive and should be able to pick up small changes in the background radiation. I plan to make a solar powered version that will sit in the window and keep a watch on things.