ACE format development at LANL: Mixed mode thermal scattering and the ACEtk toolkit
Haeck, Wim [Los Alamos National Laboratory]; Gibson, Nathan Andrew [Los Alamos National Laboratory]; Josey, Colin James [Los Alamos National Laboratory]; Kahler, Albert Comstock III [Los Alamos National Laboratory]; Conlin, Jeremy Lloyd [Los Alamos National Laboratory] · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2024
The mixed mode elastic scattering format 2. The ACEtk toolkit 10/18/21 Making a new ENDF/B library … • Every new ENDF/B generation changes formats and adds new data • The current library: ENDF/B-VIII.0(February 2018) -Fission neutron and gamma probabilities in MF6/MT18 -Sub-actinide and non-neutron induced "fission" in MF10/MT18 -Tabulated fission energy release components in MF1/MT458 • The future library: ENDF/B-VIII.1 (somewhere in 2023) -Mixed mode thermal scattering (coherent and incoherent elastic scattering) -Background R-matrix elements for resonance parameters in MF2 MT151 -Improved photonuclear data 10/18/21 Current status of ACEtkIncident neutron and charged particle continuous energy files Block Description C++ Python ESZ Energy grid and principal cross sections (total, elastic, absorption, heating) Yes Yes NU Average number of neutrons per fission Yes Yes MTR, MTRP, MTRH Available reactions (excluding elastic) Yes Yes LQR Reaction Q values Yes Yes TYR, TYRH Reference frame and multiplicity Yes Yes SIG Cross section data Yes Yes SIGP, SIGH Particle production cross sections No No AND, ANDP, ANDH Angular distribution data for secondary particles (no correlated angular) Yes Yes