Dresden 2013 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 100: Niederenergie-Neutrinophysik 2

T 100.7: Vortrag

Montag, 4. März 2013, 18:25–18:40, WIL-A317

Study of Liquid Scintillator Properties in Double Chooz — Christoph Aberle, Christian Buck, Benjamin Gramlich, Manfred Lindner, Stefan Wagner, and •Hideki Watanabe — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Double Chooz is a currently-running experiment using neutrinos from the reactor power plant in Chooz, France. Its principal physics goal is a precise measurement of the neutrino mixing angle θ₁₃, and sin²2θ₁₃ = 0.109 ± 0.030(stat.) ± 0.025(syst.) was obtained and published recently. This achievement was benefited in part by adopting the four-layer liquid structure in the middle of the detector with respect to the background event reduction. Especially, the innermost two liquid scintillators are distinguished Neutrino Target and Gamma-Catcher depending on the Gadolinium-loaded or unloaded. These were designed to establish the high light transparency, long term stability, low radiopurity and light yield matching between them. In addition, their quenching factors are also important characters to understand ultimately the energy response in Double Chooz. In this talk, presented will be the results of the above-mentioned properties of Neutrino Target and Gamma-Catcher, as well as the measurement of their quenching factors including the laboratory study conducted in Max-Planck-Institut für Kernphysik.