[SI-LIST] Re: Copper atom density

Dear Doug,

A much simpler method of attacking this is to use Avogadro's number
(6.02e23), the atomic weight of copper, and the density of copper.
 From these you can compute the number of copper atoms in any given
volume. Then, using the thickness of your target, you can determine
the number of copper atoms in its area.

There is all sorts of density data under various crystalline conditions
and temperatures.

Regards,

Paul
_______________

Doug Brooks wrote:

>I am interested in determining the density of copper atoms per unit 
>cross sectional area, i.e. the average number of atoms at the cross 
>sectional area of a conductor.
>It is given by various sources that the volumetric density of copper is between
>8.37 10^28  and
>8.5   10^28  atoms/meter^3
>
>Is it as simple as taking the 2/3 root of this number (19.3 
>10^18/meter^2)? That seems logical but not necessarily realistic. I 
>think there is a better answer but I'm not sure how to approach it.
>
>Doug Brooks
>
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-- 
Paul A. Levin
Senior Principal Engineer
Xyratex, Manhattan Beach
(310) 372-7352 - home & office
(310) 291-8199 - cell


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