Post #3697918

This thing is from 1977 but has a half-life of 90 years. And while the initial activity of 11 GBq may sound like a lot, it only produces low-energy betas and even lower-energy gammas (and very few of those, but those are the ones we want). It's also like the ghosts in Super Mario: if you look at it from the wrong side, nothing happens. Definitely practical from a radiation safety point of view!