Radioactive contamination of 7LiI(Eu) crystal scintillators
2013
Abstract The radioactive contamination of two 26 g samples of low background lithium iodide crystal scintillators doped by europium and enriched in 7 Li to 99.9% ( 7 LiI(Eu)) has been investigated by scintillation method at the sea level, and by ultra-low background HPGe γ spectrometry deep underground. No radioactive contamination was detected. In particular, the contamination of the crystal scintillators by 226 Ra and 228 Th does not exceed 1 mBq/kg, and the activity of 40 K is less than 0.5 Bq/kg.
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