In this work we present NJOY+NCrystal, a tool to generate thermal neutron scattering libraries with support for coherent and incoherent elastic components for crystalline solid materials. This tool, which is a customized version of NJOY, was created by modifying the nuclear data processing program NJOY to call the thermal scattering software library NCrystal, and includes a proposed change in the ENDF-6 format to store both the coherent and incoherent elastic components. Necessary changes to enable this format in NJOY, as well as to sample it in the OpenMC Monte Carlo code, are detailed here. Examples of materials that are coherent–dominant, incoherent–dominant, and mixed elastic scatterers are presented, as well as the creation of novel libraries for MgH2 and MgD2, that are under consideration as advanced neutron reflectors in the HighNESS project at the European Spallation Source. NJOY+NCrystal greatly simplifies the process to generate thermal scattering libraries (TSL) and this is exemplified with 213 new and updated TSL evaluations.

Ramic, K., Marquez Damian, J., Kittelmann, T., Di Julio, D., Campi, D., Bernasconi, M., et al. (2022). NJOY+NCrystal: An open-source tool for creating thermal neutron scattering libraries with mixed elastic support. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1027(11 March 2022) [10.1016/j.nima.2021.166227].

NJOY+NCrystal: An open-source tool for creating thermal neutron scattering libraries with mixed elastic support

Campi D.;Bernasconi M.;Gorini G.;
2022

Abstract

In this work we present NJOY+NCrystal, a tool to generate thermal neutron scattering libraries with support for coherent and incoherent elastic components for crystalline solid materials. This tool, which is a customized version of NJOY, was created by modifying the nuclear data processing program NJOY to call the thermal scattering software library NCrystal, and includes a proposed change in the ENDF-6 format to store both the coherent and incoherent elastic components. Necessary changes to enable this format in NJOY, as well as to sample it in the OpenMC Monte Carlo code, are detailed here. Examples of materials that are coherent–dominant, incoherent–dominant, and mixed elastic scatterers are presented, as well as the creation of novel libraries for MgH2 and MgD2, that are under consideration as advanced neutron reflectors in the HighNESS project at the European Spallation Source. NJOY+NCrystal greatly simplifies the process to generate thermal scattering libraries (TSL) and this is exemplified with 213 new and updated TSL evaluations.
Articolo in rivista - Articolo scientifico
Coherent elastic; ENDF, nuclear data; Incoherent elastic; Mixed elastic; Thermal neutron scattering libraries; Total cross section;
English
29-dic-2021
2022
1027
11 March 2022
166227
none
Ramic, K., Marquez Damian, J., Kittelmann, T., Di Julio, D., Campi, D., Bernasconi, M., et al. (2022). NJOY+NCrystal: An open-source tool for creating thermal neutron scattering libraries with mixed elastic support. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1027(11 March 2022) [10.1016/j.nima.2021.166227].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/415776
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