Lee, Juhyun, Kim, Yong-jae, Chae, Jung-seok, Oh, Jung Suk, Kwon, Eunhee, Lim, Jong-myoung, Lee, Hoon, Han, Jeong Hee, Pham, Mai Khanh, Nour, Svetlana, La Rosa, Jerome, Gaca, Pawel and Daniel, Benoit (2021) Preparation and evaluation of new reference materials for naturally occurring radioactive materials (NORM): zirconium silicate, bauxite, and phosphogypsum. Applied Radiation and Isotopes, 168, [109525]. (doi:10.1016/j.apradiso.2020.109525).
Abstract
New reference materials (RMs), zirconium silicate, bauxite and phosphogypsum, were produced and characterized according to an ISO guide. The homogeneity of the three RMs was evaluated using X-ray fluorescence (XRF), and characterizations of the three candidate materials were performed through a collaborative study with nine expert radioanalytical laboratories. The assigned radionuclides are 230Th, 232Th, 234U, 235U, and 238U for zirconium silicate; 230Th, 232Th, 234U, and 238U for bauxite; and 226Ra, 230Th, 234U, and 238U for phosphogypsum.
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