Radionuclides activity concentrations of sediment core HHN2C

Uncertainties are expressed as 1 standard deviation including counting statistics and detector calibration uncertainty. Values below decision threshold are expressed for 5% type...测量不确定度以1倍标准差的形式表征，涵盖计数统计不确定度与探测器校准不确定度。低于判定阈值的数值以5%类型（原文后续内容未完整提供）