Cuoricino results for
2nbb decay to the
first excited state 0+
Sergio Di Domizio
for the Cuoricino Collaboration
Università and INFN Genova
Athens, June 13-19 2010
Cuoricino
• Cuoricino collected data at the Laboratori Nazionali del
Gran Sasso between 2003 and 2008
• It is an array of 5x5x5 cm3 TeO2 cryogenic bolometers
devoted to the search of 0nbb decay in 130Te
• Cuoricino has a mass of 42 kg (11.8 kg in 130Te)
• The accumulated statistics is 19.8 kg∙y in 130Te
• The average energy resolution is 7 keV FWHM at 2.6 MeV
130Te
2nbb decay to the excited state 0+
2 de-excitation gs emitted
Coincidence based analysis:
strong background reduction
CUORICINO RESULT:
T1/2 > 1.4 x
23
10
y (90% C.L.)
More details in the poster