How to pronounce this term symbol?

  • Thread starter td21
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  • #1
td21
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$$5^{2}S_{\frac{1}{2}}$$
My guess is five-two-S-one-over-two. Any suggestion is appreciated. Thanks.
 

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  • #2
blue_leaf77
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We usually pronounce your "one-over-two" as "one-half".
 
  • #3
NascentOxygen
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$$5^{2}S_{\frac{1}{2}}$$
My guess is five-two-S-one-over-two. Any suggestion is appreciated. Thanks.
In what branch of science does this expression come from?

Absent further details, I'm tempted to say ##5^2## is pronounced "five squared".
 
  • #4
blue_leaf77
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I believe this is from the so-called term symbol for the state specification of many-electron atom.
 
  • #5
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The 5 is not squared, 5 and 2 have different meanings.
See here for example
http://www.astro.sunysb.edu/fwalter/AST341/qn.html

I think pronunciation is not really relevant. You don't communicate these things verbally.
 
  • #6
Khashishi
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Why is there a 5 in front? As far as I know, the term symbol shouldn't have a 5 in front.
 
  • #7
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I thought that the 5 is out of place too.
But that link seems to suggest a quantum number n that goes in front.
 
  • #8
blue_leaf77
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Why is there a 5 in front? As far as I know, the term symbol shouldn't have a 5 in front.
That's indeed uncommon, but probably that indicates that the valence shell, which is the only one incomplete, corresponds to n=5.
 

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