Posted on 06 April 2025 Featured Image Gamma Spectrum - Sr-90 - 12hours Gamma spectroscopy sources Sr-90 Here is a 12 hour spectrum accumulated on the Radiacode 103 of a spicy Sr-90 (Strontium-90) check source (~100-200 Bq) from a DP-5 Geiger counter. Both Lin and Log are shown. Archived from radmon.org - originally posted 06/04/2025 Read more