@techreport{TechReport_2025_LANL_LA-UR-25-23548Rev.1_RisingArmstrongEtAl,
  address = {Los Alamos, NM, USA},
  author = {Rising, Michael Evan and Armstrong, Jerawan Chudoung and Bolding, Simon R. and Bull, Jeffrey S. and Clark, Alexander Rich and Frederick, Cole Spencer and Giron, Jesse Frank and Grieve, Avery Sumner and Haeck, Wim and Jones, Fred Burke and Josey, Colin James and Kulesza, Joel Aaron and Lively, Michael Aaron and Swaminarayan, Sriram and Sweezy, Jeremy Ed and Weaver, Colin Andrew and Zukaitis, Anthony J.},
  institution = {Los Alamos National Laboratory},
  month = {April},
  number = {LA-UR-25-23548, Rev.~1},
  title = {{MCNP\textsuperscript{\textregistered} Code Version 6.3.1 Release Notes}},
  year = {2025}
}