Tori-kun Wrote:Yesterday I saw a documentary on TV and the professor said, concerning the action of Edano eating a tomato (not being contaminated*.. as the Geiger-Mueller instrument told him, aha). The point is these instreuments only measure substsances being gamma-emitters - not the more poisenous and dangerous** alpha and beta once.
* certainly it was.. Enough alpha and beta emitters. But who the heck cares?
** they are really dangerous, because once you "eat" and "drink" them along with food and water they'll remain in the human organism forever and will constantly radiate (-> cancer rate increases)
Wrong on so many levels
-Cesium137 and Iodine131 were the released isotopes.
-Both are beta emitters, so why would all emergency workers etc be using geiger counters that "can only detect gamma"? They would detect nothing ever, but they are indeed detecting the BETA radiation.
-Geiger counters are indeed capable of detecting alpha, beta and gamma emitters, depending on the model. Are you sure the model he was using was not so equipped?
-Gamma rays are more dangerous than alpha or beta. Alpha are the least dangerous of the three.
-Cesium137 has a biological halflife of 70 days, meaning half of it will leave your body in 70 days. Iodine131 has a radioactive halflife of 8 days, so it'll be gone even sooner. They aren't stuck in you forever.
There are other radioactive elements with long halflives and that will be integrated into body structures, but by the definition of having a long halflife they don't emit as high quantities of radiation so you'll need a large quantity of the material to get a high dose. They are also very heavy and so will not travel very far from the point of release. Also, they weren't released.
Hooray, radiation can be understood and not mindlessly feared!
I can't tell if you are backing the documentary or taunting it, so feel free to read my post as correcting whoever believes those assertions
Edited: 2011-04-21, 8:59 am