FreeLists / si-list / [SI-LIST] Re: Copper atom density

[<art_porter@xxxxxxxxxxx>]

I'm not an atomic physicist by any stretch, but atoms per unit area =
really doesn't compute (atoms don't distribute themselves nicely in =
"layers."). Probably the best approach is to define how thin a "slice" =
you want to look at, then calculate the number of atoms in that volume.  =
=20

Art Porter

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
On Behalf Of Doug Brooks
Sent: Wednesday, November 16, 2005 1:01 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Copper atom density

I am interested in determining the density of copper atoms per unit=20
cross sectional area, i.e. the average number of atoms at the cross=20
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=20
10^18/meter^2)? That seems logical but not necessarily realistic. I=20
think there is a better answer but I'm not sure how to approach it.

Doug Brooks

_________________________________________________________________________=
___-
Check out UltraCAD's new presentation videos and new skin effect=20
calculator at http://www.ultracad.com=20

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