openmc.data.RMatrixLimited¶
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class
openmc.data.RMatrixLimited(energy_min, energy_max, particle_pairs, spin_groups)[source]¶ R-matrix limited resolved resonance formalism data.
R-matrix limited resolved resonance data is identified by LRF=7 in the ENDF-6 format.
Parameters: - energy_min (float) – Minimum energy of the resolved resonance range in eV
- energy_max (float) – Maximum energy of the resolved resonance range in eV
- particle_pairs (list of dict) – List of particle pairs. Each particle pair is represented by a dictionary that contains the mass, atomic number, spin, and parity of each particle as well as other characteristics.
- spin_groups (list of dict) – List of spin groups. Each spin group is characterized by channels, resonance energies, and resonance widths.
Variables: - reduced_width (bool) – Flag indicating whether channel widths in eV or reduced-width amplitudes in eV^1/2 are given
- formalism (int) – Flag to specify which formulae for the R-matrix are to be used
- particle_pairs (list of dict) – List of particle pairs. Each particle pair is represented by a dictionary that contains the mass, atomic number, spin, and parity of each particle as well as other characteristics.
- spin_groups (list of dict) – List of spin groups. Each spin group is characterized by channels, resonance energies, and resonance widths.
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classmethod
from_endf(ev, file_obj, items)[source]¶ Read R-Matrix limited resonance 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=2, MT=151
- items (list) – Items from the CONT record at the start of the resonance range subsection
Returns: R-matrix limited resonance parameters
Return type: