Инд. авторы: | Barabash A.S., Belli P., Bernabei R., Borovlev Y.A., Cappella F., Caracciolo V., Cerulli R., Danevich F.A., Incicchitti A., Kobychev V.V., Konovalov S.I., Laubenstein M., Mokina V.M., Polischuk O.G., Safonova O.E, Shlegel V.N., Tretyak V.I., Tupitsyna I.A., Umatov V.I., Zhdankov V.N. |
Заглавие: | Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization |
Библ. ссылка: | Barabash A.S., Belli P., Bernabei R., Borovlev Y.A., Cappella F., Caracciolo V., Cerulli R., Danevich F.A., Incicchitti A., Kobychev V.V., Konovalov S.I., Laubenstein M., Mokina V.M., Polischuk O.G., Safonova O.E, Shlegel V.N., Tretyak V.I., Tupitsyna I.A., Umatov V.I., Zhdankov V.N. Improvement of radiopurity level of enriched 116CdWO4 and ZnWO4 crystal scintillators by recrystallization // Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. - 2016. - Vol.833. - P.77-81. - ISSN 0168-9002. |
Внешние системы: | DOI: 10.1016/j.nima.2016.07.025; SCOPUS: 2-s2.0-84978766072; WoS: 000383818200013; |
Реферат: | eng: 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 116CdWO4 crystal scintillator by thorium was reduced by a factor ≈10, down to the level 0.01 mBq/kg (228Th), 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 228Th) was observed in a sample of ZnWO4 crystal produced by recrystallization after removing ≈0.4 mm surface layer of the crystal. © 2016 Elsevier B.V.
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Ключевые слова: | Radioactivity; Surface layers; Specific activity; Radiopurities; Radioactive contamination; Low counting experiments; Double beta decay; Crystal scintillators; Alpha activities; Thorium; Scintillation counters; Recrystallization (metallurgy); Ionization; Contamination; ZnWO4 crystal scintillator; Radioactive contamination of scintillators; Low counting experiments; CdWO4 crystal scintillator; |
Издано: | 2016 |
Физ. характеристика: | с.77-81 |