Systematic error in 238U decay chain radionuclides measurements due to 222Rn emanation from reference materials

In high-resolution ? spectrometry 238U decay chain members can be measured by comparing reference material and unknown sample count rates induced the lines assigned to 214Pb 214Bi. Both 214Bi are daughter radionuclides of 222Rn. This noble gas nuclide escape from both natural samples, materials. If this is not properly accounted for, it could become a serious source error when determining radioactivity sample. work we investigate systematic due 222Rn emanation We report ratios in IAEA-RGU-1, IAEA-375, IAEA-385, IAEA-434, IAEA-448 materials obtained International Atomic Energy Agency, widely accepted as geological trapped charge dating community, Nussy Volkegem. addition, TLDA B-2012–1 which available completely sealed block for Landesamt für Denkmalpflege und Archäologie Weimar, Germany Par 15 profile Lublin Upland (Poland). These frequently used laboratories routine calculations members. found that contains uranium ore, has negligible ratio ca. 2.2%. Other materials, such IAEA-448, Nussy, Volkegem B-2012–1, exhibited 4% – 35% emanation. potential induce 2.4% errors radionuclide concentrations.