用于高灵敏度无中微子双β衰变搜索的含 闪烁热测辐射热计的研制。
Development of -containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search.
作者信息
Armengaud E, Augier C, Barabash A S, Beeman J W, Bekker T B, Bellini F, Benoît A, Bergé L, Bergmann T, Billard J, Boiko R S, Broniatowski A, Brudanin V, Camus P, Capelli S, Cardani L, Casali N, Cazes A, Chapellier M, Charlieux F, Chernyak D M, de Combarieu M, Coron N, Danevich F A, Dafinei I, Jesus M De, Devoyon L, Domizio S Di, Dumoulin L, Eitel K, Enss C, Ferroni F, Fleischmann A, Foerster N, Gascon J, Gastaldo L, Gironi L, Giuliani A, Grigorieva V D, Gros M, Hehn L, Hervé S, Humbert V, Ivannikova N V, Ivanov I M, Jin Y, Juillard A, Kleifges M, Kobychev V V, Konovalov S I, Koskas F, Kozlov V, Kraus H, Kudryavtsev V A, Laubenstein M, Sueur H Le, Loidl M, Magnier P, Makarov E P, Mancuso M, de Marcillac P, Marnieros S, Marrache-Kikuchi C, Nagorny S, Navick X-F, Nikolaichuk M O, Nones C, Novati V, Olivieri E, Pagnanini L, Pari P, Pattavina L, Pavan M, Paul B, Penichot Y, Pessina G, Piperno G, Pirro S, Plantevin O, Poda D V, Queguiner E, Redon T, Rodrigues M, Rozov S, Rusconi C, Sanglard V, Schäffner K, Scorza S, Shlegel V N, Siebenborn B, Strazzer O, Tcherniakhovski D, Tomei C, Tretyak V I, Umatov V I, Vagneron L, Vasiliev Ya V, Velázquez M, Vignati M, Weber M, Yakushev E, Zolotarova A S
机构信息
1IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
2Univ Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, 69622 Villeurbanne, France.
出版信息
Eur Phys J C Part Fields. 2017;77(11):785. doi: 10.1140/epjc/s10052-017-5343-2. Epub 2017 Nov 21.
This paper reports on the development of a technology involving -enriched scintillating bolometers, compatible with the goals of CUPID, a proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced and used to develop high performance single detector modules based on 0.2-0.4 kg scintillating bolometers. In particular, the energy resolution of the lithium molybdate detectors near the -value of the double-beta transition of (3034 keV) is 4-6 keV FWHM. The rejection of the -induced dominant background above 2.6 MeV is better than . Less than activity of and in the crystals is ensured by boule recrystallization. The potential of -enriched scintillating bolometers to perform high sensitivity double-beta decay searches has been demonstrated with only exposure: the two neutrino double-beta decay half-life of has been measured with the up-to-date highest accuracy as = [6.90 ± 0.15(stat.) ± 0.37(syst.)] . Both crystallization and detector technologies favor lithium molybdate, which has been selected for the ongoing construction of the CUPID-0/Mo demonstrator, containing several kg of .
本文报道了一种涉及富集碲闪烁测热辐射计的技术发展情况，该技术与CUPID的目标兼容，CUPID是一项拟进行的下一代测热辐射实验，旨在寻找无中微子双β衰变。已制备出大质量（ ）、高光洁度、含放射性纯碲的锌酸锂和钼酸锂晶体，并用于开发基于0.2 - 0.4千克闪烁测热辐射计的高性能单探测器模块。特别是，钼酸锂探测器在碲双β跃迁（3034 keV）的Q值附近的能量分辨率为4 - 6 keV半高宽。在2.6 MeV以上，由γ射线诱发的主要本底的排除率优于 。通过晶锭重结晶确保晶体中 和 的活度小于 。仅通过 的曝光就证明了富集碲闪烁测热辐射计进行高灵敏度双β衰变搜索的潜力：以最新的最高精度测量出 的双中微子双β衰变半衰期为 = [6.90 ± 0.15(统计) ± 0.37(系统)] 。结晶和探测器技术都有利于钼酸锂，它已被选用于正在建设的CUPID - 0/Mo演示器，该演示器包含几千克 。
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