I guess it is some kind of problem with the home-made counter (e.g., picking up electrical noise), or perhaps the counter is placed in a building with a higher background level.
As far as I’m aware, buildings made of blocks containing coal power plant slag have a higher background, but I don’t know how pronounced the effect is.
The normal background should be like 15–25 counts per minute for majority of Geiger tubes.
boxed|1 month ago
About the site itself: why would some of these measurements be that high? Especially the really high value in France and the one in Britain stand out.
yesturi|1 month ago
As far as I’m aware, buildings made of blocks containing coal power plant slag have a higher background, but I don’t know how pronounced the effect is.
The normal background should be like 15–25 counts per minute for majority of Geiger tubes.
a_void_sky|1 month ago
yesturi|1 month ago
Perhaps if the discussion catches on, I can send the link to the website's owner.