Graduate Hyperfine structure transition of Cs-133: calculation?

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The discussion focuses on the theoretical calculation of the hyperfine structure transition frequency of Cs-133, which is crucial for defining the second in SI Units. The user expresses difficulty finding relevant information, noting that most resources pertain to hydrogen rather than Cs-133. They seek a detailed explanation of how the frequency of 9,192,631,770 Hz is derived theoretically. A correction is made regarding the spelling of "Caesium," confirming the correct element is Cs-133. The conversation emphasizes the importance of understanding the hyperfine Hamiltonian specific to Cs-133 for atomic clock applications.
Marco Masi
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I'm looking for the theoretical calculation of the hyperfine structure transition frequency of Ca-133 which is used in atomic clocks to define the second according to SI-Units. Google, Google... there is a lot about the hyperfine Hamiltonian of hydrogen, but couldn't find none about that of Ca-133. I would like to see how that famous 9,192,631,770 Hz frequency which defines our earthly time standard is calculated through theory. Can anyone help?
 
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I think it should be Caesium not Calsium.
 
blue_leaf77 said:
I think it should be Caesium not Calsium.

Opss... You are right, Cs-133... not Ca. Thanks.
 

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