qspec.models.HyperfineQI  (  _ ,  i ,  j_l ,  j_u ,  label = None ,  qi_path = None  )[source]

A perturbative quantum interference (QI) hyperfine-structure model based on [ R. C. Brown et al., Phys. Rev. A 87, 032504 (2013)].

Parameters:

_qspec.models._base.Model

Empty model parameter. This hyperfine-structure model always uses Lorentz lineshapes. To use other lineshapes, combine it with the Convolve model.

iquant_like

The nuclear spin $I$.

j_lquant_like

The total lower state electron angular momentum $J$.

j_uquant_like

The total upper state electron angular momentum $J^\prime$.

labelstr

A label for the Splitter (isotope / isomer / transition).

qi_pathstr

Specify a directory to save and load the calculated geometric parts of the dipole matrix elements for faster repeated calculations. These depend only on the quantum numbers i, j_l and j_u.