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These files are not ENDF evaluations. They hold data needed to describe photon and electron interactions that the photoatomic sublibrary does not carry, and they are attached to an IncidentPhoton by _add_compton_profiles and _add_bremsstrahlung.
All three were copied verbatim from OpenMC's openmc/data/ directory, which is MIT licensed. The underlying evaluations are older than OpenMC and are credited below.
| File | Contents | Source |
|---|---|---|
| compton_profiles.h5 | Hartree-Fock Compton profiles J(pz) per subshell for Z = 1 to 100 | Biggs, Mendelsohn and Mann, Atomic Data and Nuclear Data Tables 16 (1975) 201 |
| BREMX.DAT | Scaled bremsstrahlung differential cross sections, 57 electron energies by 30 reduced photon energies, for Z = 1 to 100 | Seltzer and Berger, Atomic Data and Nuclear Data Tables 35 (1986) 345 |
| density_effect.h5 | Mean excitation energies and subshell ionization energies for the density effect correction, Z = 1 to 100 | Sternheimer, Berger and Seltzer, Atomic Data and Nuclear Data Tables 30 (1984) 261 |
The two HDF5 files are the only reason this package needs h5py, and the cubic spline resampling of BREMX.DAT is the only reason it needs scipy. Both are loaded once and cached, and neither format is load bearing: converting them to .npz and either precomputing or reimplementing the spline would drop both dependencies. Deferred deliberately, see fusion-neutronics/nuclear_data_to_yamc_format#19.
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