Chem120A+Notes+10-20-08

Chem120A+Notes+10-20-08 - Chem120A Notes 10/20/08 Goldsmit...

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Unformatted text preview: Chem120A Notes 10/20/08 Goldsmit and Uhlenback 1925 electron has intrinsic magnetic moment Splitting of 2p state in an inhomogeneous electric field Suggested for splitting (ie, for p orbital, =1, resulting in 3 states) 1 2 + l l Stern-Gerlach Experiment Ag atoms (4d 10 5s 1 ) have one unpaired electron, and are split by magnet, showing two signals on the detector Using , suggests l = , which is a non-integer quantum number 1 2 + l Pauli (1925) introduced the concept of electron spin, 4 th quantum number 2 1 = s m z S S , 2 are spin operator and the z-projection of the spin operator Similar to angular momentum operators, z L L , 2 2 2 1 2 1 2 1 h + = S ; 2 2 1 2 1 2 1 h + = S (1) and are spin eigenfunctions ( 2 ) 1 * * = = d d is the spin variable Hydrogen atom wavefunctions s m m n l l r e Z 2 2 1 2 1 100...
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Chem120A+Notes+10-20-08 - Chem120A Notes 10/20/08 Goldsmit...

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