Speaker
Description
NJOY+NCrystal is an open source tool which can be used to generate thermal neutron scattering libraries in a format that supports both coherent and incoherent elastic components for crystalline solids. The tool is based on a customized version of NJOY2016 [1] which calls the thermal scattering software NCrystal [2] for the calculation of the elastic components. The libraries can both be generated in a modified ENDF-6 format that stores both these components, which requires the usage of a patched Monte-Carlo transport software to read these libraries, and also in the current ENDF-6 standard format. We give some examples of libraries generated in these ways for materials that are coherent-dominant, incoherent-dominant and mixed-elastic scatterers. NJOY+NCrystal is available online [3] and can be readily used to create thermal scattering libraries for future materials of interest for a large range of nuclear applications, which is demonstrated by the creation of 213 new and updated libraries [4], presented here.
This work was funded by the HighNESS project at the European Spallation Source. HighNESS is funded by the European Framework for Research and Innovation Horizon 2020, under grant agreement 951782.
[1] Macfarlane, Rt, Douglas W. Muir, R. M. Boicourt, Albert Comstock Kahler III, and Jeremy Lloyd Conlin. The NJOY nuclear data processing system, version 2016. No. LA-UR-17-20093. (2017).
[2] Cai, X-X., and Thomas Kittelmann. NCrystal: A library for thermal neutron transport. Computer Physics Communications 246, 106851 (2020).
[3] https://github.com/highness-eu/
[4] https://github.com/highness-eu/NJOY-NCrystal-Library