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qspec.models.hf_shift  (  hyper_l hyper_u coeff_l coeff_u  )[source]

Parameters:
hyper_lIterable[scalar_like]

The hyperfine structure constants of the lower state (Al, Bl, Cl, ...).

hyper_uIterable[scalar_like]

The hyperfine structure constants of the upper state (Au, Bu, Cu, ...).

coeff_lIterable[scalar_like]

The coefficients of the lower state to be multiplied by the constants (coAl, coBl, coCl, ...).

coeff_uIterable[scalar_like]

The coefficients of the lower state to be multiplied by the constants (coAu, coBu, coCu, ...).

Returns:
outfloat

The hyperfine structure shift of an optical transition.

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