Derivation and verification of the direct-sampling method for simulating Monte Carlo flight paths in tetrahedral meshes with linear finite-element cross sectionsPablo A. Vaquer, Michael E. Rising, Joel A. Kulesza and Colin A. WeaverEPJ Nuclear Sci. Technol., 11 (2025) 58DOI: https://doi.org/10.1051/epjn/2025051