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nikolasibalic / ARC-Alkali-Rydberg-Calculator

Object-oriented Python library for computation of properties of highly-excited Rydbeg states of alkali and divalent atoms.
https://atomcalc.org
BSD 3-Clause "New" or "Revised" License
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Transition frequency mismatch of Rb87 D2 line #164

Closed gabbence95 closed 6 months ago

gabbence95 commented 10 months ago

According to Steck's datasheet, the transition frequency of the D2 line of Rb87 is 384.2304844685 THz. With ARC I get 384.2303532225151 THz.

nikolasibalic commented 6 months ago

Value in Steck is the best measured result for D1. The ARC uses for low lying state NIST values that cover much larger number of energy levels. 80 MHz discrepancy between the two is consistent with uncertanties of the sources. Depending on your purpose, you might find that this absolute difference of the order of 1 in 1000,000 is important for particular atomic calculation, but for most cases the NIST value should be fine. I hope this helps.