Subject: Background Charge

From: "A. Boufarik" <aboufer2000{at}yahoo.ca>
Date: Fri, 22 Oct 2004 08:36:09 -0400 (EDT)

Hi all,
 
I understand when charge is used, the charge is specified as a multiple of the electron charge (atomic units). However, if I wanted to set a proton at say 0.0 0.0 3(atomic unit) charge, should I say:
 
0.0 0.0 3.0 1.0 or 0.0 0.0 -1.0
 
I am just confused as regarrd the sign.
 
Cheers
 
Boufarik

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