Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absolute frequency measurement of rubidium 5S-6P transitions   We report on measurements on the 5S-6P rubidium transition frequencies for
rubidium isotopes with an absolute uncertainty of better than \SI{450}{kHz} for
the 5S $\rightarrow$ 6P$_{1/2}$ transition and \SI{20}{kHz} for the 5S
$\rightarrow$ 6P$_{3/2}$ transition, achieved by saturation absorption
spectroscopy. From the results we derive the hyperfine splitting with an
accuracy of \SI{460}{kHz} and \SI{30}{kHz}, respectively. We also verify the
literature values for the isotope shifts as well as magnetic dipole constant
and the electric quadrupole constant.

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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th