@techreport{TechReport_2024_LANL_LA-UR-24-30590_LivelyHaeck, address = {Los Alamos, NM, USA}, author = {Lively, Michael A. and Haeck, Wim}, institution = {Los Alamos National Laboratory}, month = {October}, number = {LA-UR-24-30590}, title = {{An Update to the Electron/Photon/Relaxation Data Library ACE Format Description for MCNP6}}, year = {2024} }