Well, how do you get rid of all the background radiation? Surround your
house with lead. Oh yeah, lead give off X-rays, so you have to cover the
lead with pure copper as well. It is impossible. But if the amount of
radiation is barely above background, then it really is trivial. Lets
look at what that video showed us. That the gamma radiation was about
twice background at about 1/2 inch from the detector. Now radiation
falls off by the square of the distance, so if the detector is on the
ceiling at 8' and a person who is 6' stands directly below it, they will
receive an increase of radiation of 1/((2*24)^2) = 0.0004. Now that is
for the TOP of the head, obviously as you go down it drops off even more
dramatically. And that is if you stand under it 24 hours a day.
Practically the radiation increase to your whole body over the course of
a day would be likely well under a part in a million or less. There are
many many more sources of much higher radiation than that. Just staying
on the second story of your house instead of the floor level will expose
you to an increase more than that from the shorter distance cosmic rays
have to travel through air to get to you. I worked in a building for
years that was 10 times outside background because of the shale in the
brick, then later worked in a building that was 50 times background
because of the potassium in the cinder blocks. I lived in a house where
the basement was several times over background because of the radon.
Eating one banana or avocado will expose you to thousands of times more
radiation as will taking a potassium supplement, and in fact eating
virtually anything will expose you to more radiation. Using a coleman
gas lantern will expose you to millions of times more radiation. One has
to assess the relative dangers and use their time and energy for those
which are the most significant. The 0.04% over background of the smoke
detector is trivial.
Marshall
Bob Banever wrote:
No amount of radiation is trivial. No level is safe and all ionizing
radiation causes damage to DNA.
----- Original Message ----- From: "Marshall Dudley"
<[email protected]>
To: <[email protected]>
Sent: Thursday, April 22, 2010 11:07 AM
Subject: Re: CS>A closer look at americium 241 from a smoke detector
Thanks for the video. It shows that the amount of radiation coming
off of a smoke detector is really trivial. Glad to see that.
Marshall
Del wrote:
http://www.youtube.com/watch?v=6J_KqY81EmA
----- Original Message -----
*From:* bodhisattva <mailto:[email protected]>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Wednesday, April 21, 2010 12:20 PM
*Subject:* Re: CS>More on Cell-Phone and Cell-Tower radiation
I also removed my /241am/ laced radioactive smoke detectors and
replaced them with harmless photoelectric ones. This was after I
purchased an instrument to measure the emissions from them, and
discovered they had a fairly good plume coming off them. Of
course they say "It's not enough to be harmful" to everyone, but
they are also banking on the fact that most people will never
purchase instruments to check them.
--
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