Unboxing two rare earth metal sets from Ebay seller "The Periodic Element Guys" XRF analysis of rare earth metals. Gamma Spectrum analysis of Eu-152 and Cs-137 with Radiacode 102. Attempting to build an alphavoltaic battery with a 2N3055 transistor and Pyrotronics F5B Americium source. XRF analysis of ferrocerium fire starter rods