Guest guest Posted December 6, 2002 Report Share Posted December 6, 2002 redhengirl@... wrote: > > In a message dated 12/5/2002 7:16:58 PM Eastern Standard Time, > graves_support writes: > > > Where ionising radiation of certain types are " beamed " or > > focused onto a target, the target may become radioactive (I'm > > racking my brain for the correct terminology - Devin?), but it > > is a very low grade of radioactivity, and isn't usually an issue > > except in things like material used to contain nuclear reactors, > > and then only on certain material, and certain types of ionising > > radiation. > > Are you referring to radioactive seeding? In this case, the metal " seeds, " > or targets are left in. Prostate cancer is sometimes treated in this manner. No, the term I was digging for was " secondary radiation " , and is usually caused by high neutron fluxs across metals. The Internet supplied the example of a 1 kiloton neutron bomb dropped within a kilometer of a tank will kill the occupants, and make the metal of the tank radioactive, if the crew are replaced immediately the new occupants will receive a lethal dose of radiation from the secondary radiation inside a day. Best not visit the site of a neutron bomb detonation too soon. Prostrate seeding using radioactive isotopes like I-125 " trapped " in metal pellets, so a radioactive impurity was added to the metal. In " secondary radiation " , the radiation itself creates the " impurity " . Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.