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Authored atomic-data reference: steck.us/alkalidata/rubidium87numbers.pdf

Equations (26)–(29) give the Breit-Rabi energies and clock-transition shift; the magnetic-data table gives the quadratic shift coefficient. This reference refines atomic constants; it was not supplied with the historical exam.

The sections on saturation intensity and resonant scattering cross sections, including Table 7, distinguish different polarizations and sublevel preparations for real sodium. They explain why a statistical fine-structure two-level system cross section need not equal that of a selected closed hyperfine structure transition.