Abstract
Radioactive disequilibria are a known phenomenon in the dating of archaeological ceramics and some special types of sediments. It is a proven fact that they influence luminescence dating of materials such as sandy-silty aeolian or aquatic sediments as well. Investigations of the 238U-decay chain by high resolution gamma-spectrometry and alpha-spectrometry show marked disequilibria due to 234U, 226Ra or 222Rn migration. A good dose rate estimation can be obtained only in special cases. The effect on dating is discussed for several examples and compared with dose rate evaluation by other methods.
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