ess.reduce.polarization.he3.he3_opacity_from_cell_params# ess.reduce.polarization.he3.he3_opacity_from_cell_params(pressure, length, temperature)[source]# Opacity 0 for a given cell, estimated from pressure and cell length. Return type: He3Opacity0[TypeVar(PolarizingElement, polarization.types.Analyzer (str), polarization.types.Polarizer (str))]