This reminds me of a story about my wife. She worked in a hot-lab at the time, using P-32, and she was extremely fastidious about using the Geiger counter to en

This reminds me of a story about my wife. She worked in a hot-lab at the time, using P-32, and she was extremely fastidious about using the Geiger counter to ensure she never spilled any material on the bench or equipment. Then, one day she calls me to her lab, and I can tell she's very frantic. I rush up the 3 flights of stairs and into her lab and ask what's wrong. She was worried that she had spilled the raido-isotopes because the Geiger counter was picking up counts all over! The lab bench, the pipettes, the Eppendorf tubes, everything seemed to be hot. I paused for a moment, then took the Geiger counter from her and pointed the probe at her. The needle JUMPED to the max and she turned flush white... ...the day before she had undergone a stress test with a Technetium tracer.