talk - International Workshop on Double Beta Decay and Neutrino
talk - International Workshop on Double Beta Decay and Neutrino
talk - International Workshop on Double Beta Decay and Neutrino
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Active Shielding Technique<br />
C<strong>on</strong>cept of 4 Active Shield<br />
<strong>and</strong> Performance Test<br />
PSD between CaF 2<br />
<strong>and</strong> Liquid Scintillators<br />
Setup<br />
Acrylic Case<br />
:20×20×20cm 3<br />
5inch PMT<br />
Liquid<br />
Scintillator<br />
Liq. Scintillator<br />
γ-ray<br />
CaF 2 (pure)<br />
β-ray<br />
80nsec<br />
4μsec<br />
Partial ADC Gate<br />
Full ADC Gate<br />
Liquid Scintillator<br />
Event<br />
CaF 2 (pure) Event<br />
Ratio Partial/Full<br />
Distributi<strong>on</strong> of “charge ratio”<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
20<br />
Liquid<br />
Scintillator<br />
Clear Discriminati<strong>on</strong><br />
CaF 2 (pure)<br />
CaF 2 (pure)<br />
:10×10×10cm 3<br />
Energy 2400~2600keV<br />
500 1000 1500 2000 2500 3000 3500 4000 4500<br />
CaF 2<br />
Energy(keV)<br />
Clear Discriminati<strong>on</strong> between CaF 2 <strong>and</strong> Liquid Scintillators<br />
. . .Well Act as Veto Counter<br />
UMEHARA Saori, 16 th Nov. 2011, DBD11
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