[R-390] Meters - more

[rbethman@comcast.net]

Roy and I aren't scare mongers.  We just both have a concern for fellow 
boatanchor enthusiasts.

Here is a quote from doing a lookup on Radium half-life:

> Radioactive Decay & Half-life
>
> Half-life is the period of time required for radioactive decay to 
> reduce the
> inventory of a given isotope to half of its initial value. Decay is 
> spontaneous,
> without any outside stimulus. The decay rate does not vary, so some 
> isotopes
> with long half-lives will be around for millions of years. Half-life 
> is a key
> parameter in strategies and engineered structures for treatment and 
> safe storage
> of radioactive wastes. Compared with the 1600-year half-life of 
> radium-226,
> caesium-137, cobalt-60 and iridium-192 have half-lives of 30 years, 
> 5.3 years
> and 74 days respectively.

Bob - N0DGN