Development and underground test of radiopure ZnMoO4 scintillating bolometers for the LUMINEU 0 nu 2 beta project - Département Métrologie Instrumentation & Information Accéder directement au contenu
Article Dans Une Revue Journal of Instrumentation Année : 2015

Development and underground test of radiopure ZnMoO4 scintillating bolometers for the LUMINEU 0 nu 2 beta project

E. Armengaud (1) , Q. Arnaud (2) , C. Augier (2) , A. Benoit (3) , L. Berge (4) , S. Boiko R. (5) , T. Bergmann (6) , J. Blueme (6) , A. Broniatowski (4) , V. Brudanin (7) , P. Camus (8) , A. Cazes (2) , M. Chapellier (4) , F. Charlieux (2) , M. Chernyak D. (4) , N. Coron (9) , P. Coulter (10) , A. Danevich F. (5) , T. de Boissiere (1) , R. Decourt (11) , M. de Jesus (2) , L. Devoyon (12) , A. Drillien (4) , L. Dumoulin (4) , K. Eitel (13) , C. Enss (14) , D. Filosofov (7) , A. Fleischmann (14) , N. Foerster (13) , N. Fourches (1) , J. Gascon (2) , L. Gastaldo (14) , G. Gerbier (1) , A. Giuliani (4) , D. Gray (1) , M. Gros (1) , L. Hehn (6) , S. Henry (10) , S. Herve (4) , G. Heuermann (6) , V. Humbert (4) , M. Ivanov I. (15) , A. Juillard (2) , C. Kefelian (2) , M. Kleifges (6) , H. Kluck (6) , V. Kobychev V. (5) , F. Koskas (12) , V. Kozlov (6) , H. Kraus (10) , A. Kudryavtsev (16) , Hélène Le Sueur (4) , M. Loidl (17) , P. Magnie (1) , P. E. Makarov (15) , M. Mancuso (4) , P. de Marcillac (4) , S. Marnieros (4) , C. Marrache-Kikuchi (4) , A. Menshikov (6) , G. Nasonov S. (15) , F. X. Navick (1) , C. Nones (1) , E. Olivieri (4) , P. Pari (18) , B. Paul (1) , Y. Penichot (1) , G. Pessina (19) , M.C. Piro (4) , O. Plantevin (4) , V. Poda D. (4) , T. Redon (9) , M. Robinson (16) , M. Rodrigues (17) , S. Rozov (7) , V. Sanglard (2) , B. Schmidt (6) , S. Scorza (6) , N. Shlegel V. (15) , B. Siebenborn (6) , O. Strazzer (1) , D. Tcherniakhovski (6) , M. Tenconi (4) , I. Tretyak V. (5) , L. Vagneron (2) , V. Vasiliev Ya (15) , Matias Velázquez (20) , Oudomsack Viraphong (11) , J. Walker R. (6) , M. Weber (6) , E. Yakushev (7) , X. Zhang (10) , N. Zhdankov V. (21) , L. Torres (22)
P. Camus
  • Fonction : Auteur
P. Coulter
  • Fonction : Auteur
S. Henry
  • Fonction : Auteur
H. Kraus
  • Fonction : Auteur
X. Zhang
  • Fonction : Auteur
N. Zhdankov V.
  • Fonction : Auteur

Résumé

The LUMINEU (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) project envisages a high-sensitivity search for neutrinoless double beta (0 nu 2 beta) decay of Mo-100 with the help of scintillating bolometers based on zinc molybdate (ZnMoO4) 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 ZnMoO4 crystal scintillators with extremely high internal radiopurity. Here we report a significant progress in the development of large volume ZnMoO4 crystalline boules (with mass up to 1 kg) from deeply purified materials. We present and discuss the results achieved with two ZnMoO4 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 Po-210 at the level of 1 mBq/kg, while the activity of Ra-226 and Th-228 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 0 nu 2 beta experiment.
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in2p3-01186517 , version 1 (24-03-2020)

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E. Armengaud, Q. Arnaud, C. Augier, A. Benoit, L. Berge, et al.. Development and underground test of radiopure ZnMoO4 scintillating bolometers for the LUMINEU 0 nu 2 beta project. Journal of Instrumentation, 2015, 10 (5), pp.P05007. ⟨10.1088/1748-0221/10/05/P05007⟩. ⟨in2p3-01186517⟩
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