Is the "postulated heat" caused by friction as the particals slow down or do the particals themselves emenate an endless supply of heat.
For you're theory to be correct one of the two mutually exclusive and collectively exhaustive physical laws breaking theories must exist...
So which is it:
Do radiation particles emit endless heat energy? or
Do radiations particles run into other matter which slows them down (friction) which generates heat. Eventually slowing the particles to a halt.
or I guess you could argue that radioactive decay continues on indefinitly...Which would also violate the laws of physics as its been proven that radioactive elements have a half life.
But then I'm just an accountant and don't understand a thing about nuclear physics.
Scott