104A Sp09 lecture 3

104A Sp09 lecture 3 - Reading for Spectroscopic Term...

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Reading for Spectroscopic Term Symbols: DeKock and Gray, Chap. 1 pp. 57-65 Miessler and Tarr, Chap. 11 pp. 382-389
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Electronic States, Term Symbols C: 1 s 2 2 s 2 2 p 2 different energies 1 s 2 s 2 p These microstates are defined by a set of unique quantum numbers and correspond to electronic states of a specific energy.
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Atomic energy states Total orbital angular momentum L Total spin angular momentum S Total angular momentum J 2S+1 L J Term Symbol
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Microstates for the p 2 configuration 0 + m s m l 15 microstates
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Maximum value of M L (2) occurs for M S = 0 L = 2 (M L = 2,1,0,-1,-2) only when M S = 0 (S = 0) 1 D electronic state corresponds to 5 microstates; one in each row for M S = 0
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Largest M L remaining = 1 L = 1 (P state) microstates with M L = 1,0,-1 associated with M S = 1,0,-1 9 microstates (L = 1, S = 1) corresponding to 3 P left with one microstate with M S = 0 and M L = 0 L = 0, S = 0 1 S
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E 2 2 2 2 2 1 : p s s C 0 1 S 2 1 D 2 3 P 1 3 P 0 3 P
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104A Sp09 lecture 3 - Reading for Spectroscopic Term...

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