On Sat, 12 Nov 2011 09:54:26 +0000, The Natural Philosopher wrote:

Agreed, the fact they are big and heavy and get absorbed so easyly

They don't get absorbed easily. Not smoke alarm emitters

"They" in the context was alpha particles rather than lumps of
americium.

"If consumed, americium is excreted within a few days and only 0.05% is
absorbed in the blood.

Fair enough but what if you breath it in and lodges deep in a lung...

--
Cheers
Dave.