TY - RPRT TI - A new highly enriched 233 U reference material for improved simultaneous determination of uranium amount and isotope amount ratios in trace level samples AU - Essex, Richard M. AU - Williams, Ross W. AU - Rogers, Kayron T. AU - Hexel, Cole R. AU - Parsons-Davis, Tashi AU - Treinen, Kerri C. PY - 2021 DO - 10.1016/j.talanta.2020.121638 UR - https://www.osti.gov/biblio/1678855 ID - 1678855 ER -