Hey do you guys know what the best radioactive material is to keep you warm while being as safe as possible?
Preferably from like 0 to 5 meters distance from the source of the heat decay. I'm in my 2nd year of applied physics at Uni and may get some access to certain useful elements
You would be surprised (and scared) if you knew what you will find in a normal university. A small inspection where I studied found enough neurotoxins to kill the entire city.
As for radioisotopes you can get hold of it ... in small quantities but not enough to keep you warm.
What you want is an alpha emitter having a shortish half life and where the daughter products do not emit dangerous levels of beta, gamma and neutron radiation.
Oh and just for fun: buy potassium based salt ersatz (KCl) and wave your Geiger counter around ... and hear it scream. This stuff is quite radioactive yet you buy it off the shelf and even worse: you are meant to eat it.