/ Instrumentation

Development and underground test of radiopure ZnMoO$_4$ scintillating bolometers for the LUMINEU $0\nu 2 \beta$ project

Armengaud, E. (IRFU, Saclay) ; Arnaud, Q. (Lyon, IPN) ; Augier, C. (Lyon, IPN) ; Benoît, A. (Lyon, IPN) ; Benoît, A. (Neel Lab, Grenoble) ; Bergé, L. (CSNSM, Orsay) ; Boiko, R.S. (Kiev, INR) ; Bergmann, T. (KIT, Karlsruhe, IPE) ; Blümer, J. (Karlsruhe, Forschungszentrum) ; Broniatowski, A. (CSNSM, Orsay) ; Brudanin, V. (Dubna, JINR) ; Camus, P. (Neel Lab, Grenoble) ; Cazes, A. (Lyon, IPN) ; Chapellier, M. (CSNSM, Orsay) ; Charlieux, F. (Lyon, IPN) ; Chernyak, D.M. (Kiev, INR) ; Coron, N. (Orsay, IAS) ; Coulter, P. (Oxford U.) ; Danevich, F.A. (Kiev, INR) ; de Boissière, T. (IRFU, Saclay) ; Decourt, R. (Bordeaux U.) ; Jesus, M.De (Lyon, IPN) ; Devoyon, L. (IRFU, Saclay) ; Drillien, A.A. (CSNSM, Orsay) ; Dumoulin, L. (CSNSM, Orsay) ; Eitel, K. (Karlsruhe, Forschungszentrum) ; Enss, C. (Kirchhoff Inst. Phys.) ; Filosofov, D. (Dubna, JINR) ; Fleischmann, A. (Kirchhoff Inst. Phys.) ; Foerster, N. (Karlsruhe U., EKP) ; Fourches, N. (IRFU, Saclay) ; Gascon, J. (Lyon, IPN) ; Gastaldo, L. (Kirchhoff Inst. Phys.) ; Gerbier, G. (IRFU, Saclay) ; Giuliani, A. (INFN, Milan Bicocca) ; Gray, D. (IRFU, Saclay) ; Gros, M. (IRFU, Saclay) ; Hehn, L. (Karlsruhe, Forschungszentrum) ; Henry, S. (Oxford U.) ; Hervé, S. (IRFU, Saclay) ; Heuermann, G. (Karlsruhe U., EKP) ; Humbert, V. (CSNSM, Orsay) ; Ivanov, I.M. (Novosibirsk, Inst. Inorganic Chem.) ; Juillard, A. (Lyon, IPN) ; Kéfélian, C. (Karlsruhe U., EKP) ; Kleifges, M. (KIT, Karlsruhe, IPE) ; Kluck, H. (Vienna, OAW) ; Kobychev, V.V. (Kiev, INR) ; Koskas, F. (IRFU, Saclay) ; Kozlov, V. (Karlsruhe, Forschungszentrum) ; Kraus, H. (Oxford U.) ; Kudryavtsev, V.A. (Sheffield U.) ; Sueur, H.Le (CSNSM, Orsay) ; Loidl, M. (LIST, Saclay) ; Magnier, P. (IRFU, Saclay) ; Makarov, E.P. (Novosibirsk, Inst. Inorganic Chem.) ; Mancuso, M. (Insubria U., Como) ; de Marcillac, P. (CSNSM, Orsay) ; Marnieros, S. (CSNSM, Orsay) ; Marrache-Kikuchi, C. (CSNSM, Orsay) ; Menshikov, A. (KIT, Karlsruhe, IPE) ; Nasonov, S.G. (Novosibirsk, Inst. Inorganic Chem.) ; Navick, X.F. (IRFU, Saclay) ; Nones, C. (IRFU, Saclay) ; Olivieri, E. (CSNSM, Orsay) ; Pari, P. (IRFU, Saclay) ; Paul, B. (IRFU, Saclay) ; Penichot, Y. (IRFU, Saclay) ; Pessina, G. (Milan Bicocca U.) ; Piro, M.C. (CSNSM, Orsay) ; Plantevin, O. (CSNSM, Orsay) ; Poda, D.V. (Kiev, INR) ; Redon, T. (Orsay, IAS) ; Robinson, M. (Sheffield U.) ; Rodrigues, M. (LIST, Saclay) ; Rozov, S. (Dubna, JINR) ; Sanglard, V. (Lyon, IPN) ; Schmidt, B. (Karlsruhe, Forschungszentrum) ; Scorza, S. (Karlsruhe U., EKP) ; Shlegel, V.N. (Novosibirsk, Inst. Inorganic Chem.) ; Siebenborn, B. (Karlsruhe, Forschungszentrum) ; Strazzer, O. (IRFU, Saclay) ; Tcherniakhovski, D. (KIT, Karlsruhe, IPE) ; Tenconi, M. (CSNSM, Orsay) ; Torres, L. (Orsay, IAS) ; Tretyak, V.I. (INFN, Rome) ; Vagneron, L. (Lyon, IPN) ; Vasiliev, Ya.V. (Novosibirsk, Inst. Inorganic Chem.) ; Velazquez, M. (Bordeaux U.) ; Viraphong, O. (Bordeaux U.) ; Walker, R.J. (Karlsruhe, Forschungszentrum) ; Weber, M. (KIT, Karlsruhe, IPE) ; Yakushev, E. (Dubna, JINR) ; Zhang, X. (Oxford U.) ; Zhdankov, V.N. (Novosibirsk, IAE)

Published in: JINST
Year: 2015
Vol.: 10    Num./Issue: 05
Page No: P05007
Year: 2015-05-14 published

Abstract: The LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) project envisages a high-sensitivity search for neutrinoless double beta (0ν 2β) decay of (100)Mo with the help of scintillating bolometers based on zinc molybdate (ZnMoO(4)) crystals. One of the crucial points for the successful performance of this experiment is the development of a protocol for producing high quality large mass ZnMoO(4) crystal scintillators with extremely high internal radiopurity. Here we report a significant progress in the development of large volume ZnMoO(4) crystalline boules (with mass up to 1 kg) from deeply purified materials. We present and discuss the results achieved with two ZnMoO(4) samples (with mass of about 0.3 kg each): one is a precursor of the LUMINEU project, while the other one was produced in the framework of LUMINEU with an improved purification / crystallization procedure. The two crystals were measured deep underground as scintillating bolometers in the EDELWEISS dilution refrigerator at the Laboratoire Souterrain de Modane (France) protected by a rock overburden corresponding to 4800 m w.e. The results indicate that both tested crystals are highly radiopure. However, the advanced LUMINEU sample shows a clear improvement with respect to the precursor, exhibiting only a trace internal contamination related with (210)Po at the level of 1 mBq/kg, while the activity of (226)Ra and (228)Th is below 0.005 mBq/kg. This demonstrates that the LUMINEU purification and crystal-growth procedures are very efficient and leads to radiopurity levels which exceedingly satisfy not only the LUMINEU goals but also the requirements of a next-generation 0ν 2β experiment.

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DOI: 10.1088/1748-0221/10/05/P05007
 Record created 2015-06-01, last modified 2015-06-01

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