Re: Radioactive material on CV990 ?

Date:         23 Nov 97 03:04:04 
From:         tjotoole@bit-net.com
References:   1
View raw article
  or MIME structure


On 3 Nov 1997, James Matthew Weber wrote:
> >- Are there other examples where radioactive materials are employed in
> >civil a/c ?
>
> It dawns on me there is indeed, and it is on most aircraft. The Exit
> signs that glow  in the dark, use Tritium, the radioactive isotope of
> Hydrogren to light them. It is essentially a luminous dial, but a lot
> less hazardous than using radium.
>
> Tritium is a low energy Beta emitter, with a fairly short half life
> (about 5 years I think). The Beta energy is sufficiently low that the
> radiation is probably undetectable outside the sign.

Not to mention that if your watch glows it contains tritium.  Also tritium
is used on night sights for firearms. It's relatively harmless.

Tom