Yes, and that's how they found it. But as this comment explains, it's not quite as trivial as you'd think: https://news.ycombinator.com/item?id=34570931 https

Yes, and that's how they found it. But as this comment explains, it's not quite as trivial as you'd think: https://news.ycombinator.com/item?id=34570931 https://news.ycombinator.com/item?id=34570931 We were lucky that it was found close to the road and thus not masked by background radiation.