Portable Radiation Detector: 10 Steps (with Pictures)

http://www.instructables.com/id/Radiation-Detector/

Ever wondered how to make silicon radiation sensors? Here is a tutorial on them.

 This is a tutorial to design, construct, and test your own portable Silicon photo-diode Radiation Detector suitable for the 5keV-10MeV detection range to accurately quantify low energy gamma-rays coming from radioactive sources!