talk - International Workshop on Double Beta Decay and Neutrino

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Active Shielding Technique Concept of 4 Active Shield and Performance Test PSD between CaF 2 and Liquid Scintillators Setup Acrylic Case :20×20×20cm 3 5inch PMT Liquid Scintillator Liq. Scintillator γ-ray CaF 2 (pure) β-ray 80nsec 4μsec Partial ADC Gate Full ADC Gate Liquid Scintillator Event CaF 2 (pure) Event Ratio Partial/Full Distribution of “charge ratio” 1 0.8 0.6 0.4 0.2 0 20 Liquid Scintillator Clear Discrimination CaF 2 (pure) CaF 2 (pure) :10×10×10cm 3 Energy 2400~2600keV 500 1000 1500 2000 2500 3000 3500 4000 4500 CaF 2 Energy(keV) Clear Discrimination between CaF 2 and Liquid Scintillators . . .Well Act as Veto Counter UMEHARA Saori, 16 th Nov. 2011, DBD11
CANDLES III at Kamioka Lab. CANDLES at Kamioka underground Lab. CANDLES III 3m diameter × 4m height Kamioka Lab. Map (water tank) KamLAND Lab D 4m 3m Super Kamiokande CANDLES CANDLES III
Page 1 and 2: CANDLES for the study for Double Be
Page 3 and 4: Double Beta Decay Double Beta Decay
Page 5 and 6: Schematic drawing of ELEGANT VI CaF
Page 7: Design Concepts of CANDLES CANDLES
Page 11 and 12: Pulse Height 800 700 600 500 400 30
Page 13 and 14: Position Reconstruction 250 200 150
Page 15 and 16: Counts 10 2 Half-life:175±10μsec(
Page 17 and 18: Sequential Events 212 Bi→ 212 Po
Page 19 and 20: R&D : Enrichment of 48 Ca Enrichmen
Page 21 and 22: Sensitivity of CANDLES Series CANDL

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