On Mon, 14 May 2018 10:10:53 -0400, Peter
wrote:

The risk from the radiation released by a properly installed ionization
smoke detector is essentially nil. The radiation released is alpha
radiation, which is so low in energy that is completely shielded by a
thin sheet of paper, and certainly by the capsule containing it within
the smoke alarm. Even if the smoke alarm were broken apart, your skin
would shield you completely. In any case, the total radiation released
is less than 1/3 typical background radiation, and much less than you
receive from a cosmic rays during a single typical commercial airline
flight. In terms of absolute risk, your risk of dying from a house
fire, an automobile trip of even a few blocks, lightning strike, or
insect or snake bite is exponentially higher than the risk of dying from
the radiation from a smoke detector. Smoke detector save lives.


+1

You can lead the nymshifter to knowledge, but you can't make him learn