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Development of large-volume $^{130}$TeO$_2$ bolometers for the CROSS $2β$ decay search experiment

Fuente: arXiv
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Auteurs principaux: Avignone III, F. T., Barabash, A. S., Berest, V., Bergé, L., Calvo-Mozota, J. M., Carniti, P., Chapellier, M., Dafinei, I., Danevich, F. A., Dumoulin, L., Ferella, F., Ferri, F., Gallas, A., Giuliani, A., Gotti, C., Gras, P., Ianni, A., Imbert, L., Khalife, H., Kobychev, V. V., Konovalov, S. I., Loaiza, P., de Marcillac, P., Marnieros, S., Marrache-Kikuchi, C. A., Martinez, M., Nisi, S., Nones, C., Olivieri, E., de Solórzano, A. Ortiz, Peinaud, Y., Pessina, G., Poda, D. V., Rosier, Ph., Scarpaci, J. A., Tretyak, V. I., Umatov, V. I., Zarytskyy, M. M., Zolotarova, A.
Format: Preprint
Publié: 2024
Sujets:
Instrumentation and Detectors
Nuclear Experiment
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author Avignone III, F. T.
Barabash, A. S.
Berest, V.
Bergé, L.
Calvo-Mozota, J. M.
Carniti, P.
Chapellier, M.
Dafinei, I.
Danevich, F. A.
Dumoulin, L.
Ferella, F.
Ferri, F.
Gallas, A.
Giuliani, A.
Gotti, C.
Gras, P.
Ianni, A.
Imbert, L.
Khalife, H.
Kobychev, V. V.
Konovalov, S. I.
Loaiza, P.
de Marcillac, P.
Marnieros, S.
Marrache-Kikuchi, C. A.
Martinez, M.
Nisi, S.
Nones, C.
Olivieri, E.
de Solórzano, A. Ortiz
Peinaud, Y.
Pessina, G.
Poda, D. V.
Rosier, Ph.
Scarpaci, J. A.
Tretyak, V. I.
Umatov, V. I.
Zarytskyy, M. M.
Zolotarova, A.
author_facet Avignone III, F. T.
Barabash, A. S.
Berest, V.
Bergé, L.
Calvo-Mozota, J. M.
Carniti, P.
Chapellier, M.
Dafinei, I.
Danevich, F. A.
Dumoulin, L.
Ferella, F.
Ferri, F.
Gallas, A.
Giuliani, A.
Gotti, C.
Gras, P.
Ianni, A.
Imbert, L.
Khalife, H.
Kobychev, V. V.
Konovalov, S. I.
Loaiza, P.
de Marcillac, P.
Marnieros, S.
Marrache-Kikuchi, C. A.
Martinez, M.
Nisi, S.
Nones, C.
Olivieri, E.
de Solórzano, A. Ortiz
Peinaud, Y.
Pessina, G.
Poda, D. V.
Rosier, Ph.
Scarpaci, J. A.
Tretyak, V. I.
Umatov, V. I.
Zarytskyy, M. M.
Zolotarova, A.
contents We report on the development of thermal detectors based on large-size tellurium dioxide crystals (45x45x45 mm), containing tellurium enriched in $^{130}$Te to about 91%, for the CROSS double-beta decay experiment. A powder used for the crystals growth was additionally purified by the directional solidification method, resulting in the reduction of the concentration of impurities by a factor 10, to a few ppm of the total concentration of residual elements (the main impurity is Fe). The purest part of the ingot (the first ~200 mm, about 80% of the total length of the cylindrical part of the ingot) was determined by scanning segregation profiles of impurities and used for the $^{130}$TeO$_2$ powder production with no evidence of re-contamination. The crystal growth was verified with precursors produced from powder with natural Te isotopic composition, and two small-size (20x20x10 mm) samples were tested at a sea-level laboratory showing high bolometric and spectrometric performance together with acceptable $^{210}$Po content (below 10 mBq/kg). This growth method was then applied for the production of six large cubic $^{130}$TeO$_2$ crystals and 4 of them were taken randomly to be characterized at the Canfranc underground laboratory, in the CROSS-dedicated low-background cryogenic facility. Two $^{130}$TeO$_2$ samples were coated with a thin, $O$(100 nm), metal film in form of Al layer (on 4 sides) or AlPd grid (on a single side) to investigate the possibility to tag surface events by pulse-shape discrimination. Similarly to the small natural precursors, large-volume $^{130}$TeO$_2$ bolometers show high performance and even better internal purity ($^{210}$Po activity $\sim$ 1 mBq/kg, while activities of $^{228}$Th and $^{226}$Ra are below 0.01 mBq/kg), satisfying requirements for the CROSS and, potentially, next-generation experiments.
format Preprint
id arxiv_https___arxiv_org_abs_2406_01444
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle Development of large-volume $^{130}$TeO$_2$ bolometers for the CROSS $2β$ decay search experiment
Avignone III, F. T.
Barabash, A. S.
Berest, V.
Bergé, L.
Calvo-Mozota, J. M.
Carniti, P.
Chapellier, M.
Dafinei, I.
Danevich, F. A.
Dumoulin, L.
Ferella, F.
Ferri, F.
Gallas, A.
Giuliani, A.
Gotti, C.
Gras, P.
Ianni, A.
Imbert, L.
Khalife, H.
Kobychev, V. V.
Konovalov, S. I.
Loaiza, P.
de Marcillac, P.
Marnieros, S.
Marrache-Kikuchi, C. A.
Martinez, M.
Nisi, S.
Nones, C.
Olivieri, E.
de Solórzano, A. Ortiz
Peinaud, Y.
Pessina, G.
Poda, D. V.
Rosier, Ph.
Scarpaci, J. A.
Tretyak, V. I.
Umatov, V. I.
Zarytskyy, M. M.
Zolotarova, A.
Instrumentation and Detectors
Nuclear Experiment
We report on the development of thermal detectors based on large-size tellurium dioxide crystals (45x45x45 mm), containing tellurium enriched in $^{130}$Te to about 91%, for the CROSS double-beta decay experiment. A powder used for the crystals growth was additionally purified by the directional solidification method, resulting in the reduction of the concentration of impurities by a factor 10, to a few ppm of the total concentration of residual elements (the main impurity is Fe). The purest part of the ingot (the first ~200 mm, about 80% of the total length of the cylindrical part of the ingot) was determined by scanning segregation profiles of impurities and used for the $^{130}$TeO$_2$ powder production with no evidence of re-contamination. The crystal growth was verified with precursors produced from powder with natural Te isotopic composition, and two small-size (20x20x10 mm) samples were tested at a sea-level laboratory showing high bolometric and spectrometric performance together with acceptable $^{210}$Po content (below 10 mBq/kg). This growth method was then applied for the production of six large cubic $^{130}$TeO$_2$ crystals and 4 of them were taken randomly to be characterized at the Canfranc underground laboratory, in the CROSS-dedicated low-background cryogenic facility. Two $^{130}$TeO$_2$ samples were coated with a thin, $O$(100 nm), metal film in form of Al layer (on 4 sides) or AlPd grid (on a single side) to investigate the possibility to tag surface events by pulse-shape discrimination. Similarly to the small natural precursors, large-volume $^{130}$TeO$_2$ bolometers show high performance and even better internal purity ($^{210}$Po activity $\sim$ 1 mBq/kg, while activities of $^{228}$Th and $^{226}$Ra are below 0.01 mBq/kg), satisfying requirements for the CROSS and, potentially, next-generation experiments.
title Development of large-volume $^{130}$TeO$_2$ bolometers for the CROSS $2β$ decay search experiment
topic Instrumentation and Detectors
Nuclear Experiment
url https://arxiv.org/abs/2406.01444

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