openmc.data.Unresolved

class openmc.data.Unresolved(target_spin, energy_min, energy_max, channel, scattering)[source]

Unresolved resonance parameters as identified by LRU=2 in MF=2.

Parameters

  • target_spin (float) – Intrinsic spin, \(I\), of the target nuclide

  • energy_min (float) – Minimum energy of the unresolved resonance range in eV

  • energy_max (float) – Maximum energy of the unresolved resonance range in eV

  • channel (openmc.data.Function1D) – Channel radii as a function of energy

  • scattering (openmc.data.Function1D) – Scattering radii as a function of energy

Variables

  • add_to_background (bool) – If True, file 3 contains partial cross sections to be added to the average unresolved cross sections calculated from parameters.

  • atomic_weight_ratio (float) – Atomic weight ratio of the target nuclide

  • channel_radius (openmc.data.Function1D) – Channel radii as a function of energy

  • energies (Iterable of float) – Energies at which parameters are tabulated

  • energy_max (float) – Maximum energy of the unresolved resonance range in eV

  • energy_min (float) – Minimum energy of the unresolved resonance range in eV

  • parameters (list of pandas.DataFrame) – Average resonance parameters at each energy

  • scattering_radius (openmc.data.Function1D) – Scattering radii as a function of energy

  • target_spin (float) – Intrinsic spin, \(I\), of the target nuclide

classmethod from_endf(file_obj, items, fission_widths)[source]

Read unresolved resonance data from an ENDF evaluation.

Parameters

  • file_obj (file-like object) – ENDF file positioned at the second record of a resonance range subsection in MF=2, MT=151

  • items (list) – Items from the CONT record at the start of the resonance range subsection

  • fission_widths (bool) – Whether fission widths are given

Returns

Unresolved resonance region parameters

Return type

openmc.data.Unresolved