Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization
2016
Abstract As low as possible radioactive contamination of a detector plays a crucial role to improve sensitivity of a double beta decay experiment. The radioactive contamination of a sample of 116 CdWO 4 crystal scintillator by thorium was reduced by a factor ≈10, down to the level 0.01 mBq/kg ( 228 Th), by exploiting the recrystallization procedure. The total alpha activity of uranium and thorium daughters was reduced by a factor ≈3, down to 1.6 mBq/kg. No change in the specific activity (the total α activity and 228 Th) was observed in a sample of ZnWO 4 crystal produced by recrystallization after removing ≈0.4 mm surface layer of the crystal.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
34
References
38
Citations
NaN
KQI