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talk - International Workshop on Double Beta Decay and Neutrino

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<strong>Double</strong> <strong>Beta</strong> <strong>Decay</strong> of 48 Ca<br />

Why 48 Ca?<br />

Higher Q -value(4.27MeV) . . .<br />

76<br />

Ge(2.0MeV), 100 Mo(3.0MeV), 130 Te(2.5MeV)<br />

→Low background<br />

because Q -value is higher than BG<br />

E max =2.6MeV( 208 Tl, -ray)<br />

3.3MeV( 214 Bi,-ray)<br />

We have developed the detector system<br />

for no background measurement<br />

<strong>Double</strong> beta decay of 48 Ca by CaF 2 scintillators<br />

ELEGANT VI system<br />

Scale up<br />

CANDLES series

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