openmc.data.mass_energy_absorption_coefficient
- openmc.data.mass_energy_absorption_coefficient(material: str, data_source: str = 'nist126') Tabulated1D[source]
Return the mass energy-absorption coefficient as a function of energy.
The mass energy-absorption coefficient, \(\mu_\text{en}/\rho\), is defined as the fraction of incident photon energy absorbed in a material per unit mass less the energy carried away by scattered photons. It is obtained from NIST Standard Reference Database 126: X-Ray Mass Attenuation Coefficients.
- Parameters:
material ({'air'}) – Material compound for which to load coefficients.
data_source ({'nist126'}) – Source library.
- Returns:
Mass energy-absorption coefficient [cm^2/g] as a function of photon energy [eV], using log-log interpolation.
- Return type: