[Wien] spin-up and spin-down electrons

[Stefaan Cottenier]

>I think I still have trouble to understand that. Why the UP and DOWN electrons
>have the same description? The case.inst file at page 73 in UG was enclosed.
>
>ZINC
>Ne 6 (inert gas, # OF VALENCE ORBITALS not counting spin)
>3,-1,1.0 N 3S UP
>3,-1,1.0 N 3S DN----------------???????Why this line is describing 3S DN
>electrons? It is same as the upper line!
>  
>
The program 'knows' that whenever it reads an even line in case.inst, it 
is a dn electron, while odd lines are up electrons -- just convention. 
(not sure whether that really answers your question?)

Stefaan


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