openmc.data.MultiLevelBreitWignerCovariance¶
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class
openmc.data.MultiLevelBreitWignerCovariance(energy_min, energy_max, parameters, covariance, mpar, lcomp, file2res)[source]¶ Multi-level Breit-Wigner resolved resonance formalism covariance data. :param energy_min: Minimum energy of the resolved resonance range in eV :type energy_min: float :param energy_max: Maximum energy of the resolved resonance range in eV :type energy_max: float
Variables: - energy_min (float) – Minimum energy of the resolved resonance range in eV
- energy_max (float) – Maximum energy of the resolved resonance range in eV
- parameters (pandas.DataFrame) – Resonance parameters
- covariance (numpy.array) – The covariance matrix contained within the ENDF evaluation
- mpar (int) – Number of parameters in covariance matrix for each individual resonance
- lcomp (int) – Flag indicating format of the covariance matrix within the ENDF file
- file2res (openmc.data.ResonanceRange object) – Corresponding resonance range with File 2 data.
- formalism (str) – String descriptor of formalism
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classmethod
from_endf(ev, file_obj, items, resonance)[source]¶ Create MLBW covariance data from an ENDF evaluation.
Parameters: - ev (openmc.data.endf.Evaluation) – ENDF evaluation
- file_obj (file-like object) – ENDF file positioned at the second record of a resonance range subsection in MF=32, MT=151
- items (list) – Items from the CONT record at the start of the resonance range subsection
- resonance (openmc.data.ResonanceRange object) – Corresponding resonance range with File 2 data.
Returns: Multi-level Breit-Wigner resonance covariance parameters
Return type: