arc.alkali_atom_functions.getEnergy does not use quantum defect calculation for low n

[svenjandura]

The function arc.alkali_atom_functions.getEnergy does not use quantum defect calculations if n < arc.alkali_atom_functions.minQuantumDefectN . While this is supposedly desired behavior, it is in contrast to the documentation of getEnergy: "For preferQuantumDefects =True, program will always calculate energies from quantum defects (useful for comparing quantum defect calculations with measured energy level values)"

[nikolasibalic]

Many thanks for reporting this. Clarification of this is added in the documentation (e5d558a).

Indeed, below minQuantumDefectN quantum defects do not give good results (in low n limit, there is usually clear limit of extrapolation since most quantum defect values are fitted for higher lying states).