How was pauli exclusion principle derived ?

mraptor
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How was Pauli exclusion principle derived ?
Experimental ? From some other physical formula ? Which ?
From some other principle ?

thanx
 
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Pauli sought to explain a previously purely empirical phenomenon in atomic structure... but he was doing this against a background of studying a range of related phenomena.
http://en.wikipedia.org/wiki/Pauli_exclusion_principle#History
... this is one where the observations came first. It wasn't derived so much as deduced.
 

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