I visited Chernobyl recently with a tourist company, having read that the radiation levels that I would be exposed to were okay for a limited amount of time. I learned on the trip however, that the greatest risk consisted in getting contaminated particles in your body. The guide took us around different places, inside buildings in Pripyat, for example the hospital where the firemen's hats were left. I washed my hands before eating in the canteen and I think that I did not touch my face inside the inner zone. But since the guide took us around at many places, it felt like it was impossible not to touch a wall or a plant here and there, even though I tried to avoid it. The scanner did not detect any radiation on my way out. What worries me, is that I might have gotten these particles inside my body, or that they are left on my jacket or something. Therefor I would want to understand more about these particles. - What is a contaminated particle? Can someone explain this? Can they be anywhere in the Chernobyl area? Or can they only be found in "hot spots"? - They have scanners on the way out from the zone - and it let me through. Do anyone know if these scanners are sensitive? Would they detect a small particle? - The guide touched the fireman's hat with the geiger counter, and later gave me the geiger counter - is it possible that contaminated particles got stuck on the counter and then on the guide's and my hand? - Is there any way for me now, to control or scan if I have any radioactive particles inside my body? I would be so grateful it if someone could answer me! I can't stop thinking about it!