Cuoricino

(the experiment was closed on June 2008)

 

CUORICINO was an array of 62 TeO2 bolometers designed to search for the Neutrinoless Double Beta Decay of 130Te. With a total mass of 40.7 kg of TeO2, corresponding to about 11 kg of 130Te, CUORICINO has reached a sensitivity on the Majorana mass of neutrino comparable with that achieved by the Heidelberg-Moscow and NEMO3 experiments. The experiment was operated since year 2003 in the underground Hall A of Laboratori Nazionali del Gran Sasso (L'Aquila, Italy) and was closed in June 2008.

The same cryogenic apparatus used in CUORICINO is now being employed for the CUORE-0 experiment.

 

 CUORICINO in a nutshell
 Detector 40.7 kg of natural TeO2
 Exposure 91.45 x 1024 (130Te Nuclei) x year
 Calibration FWHM (large crystals) ~ 6 keV
 130Te Double Beta Decay Results  T1/2 > 2.8 x 1024 y (90% C.L.)
 120Te Double Beta Decay Results T1/20ν > 7.6 × 1019 yr (90% CL).

 

     

 Exposure:




 

     

Calibration:


 



 

     

130Te Double Beta Decay:

natural i.a. = 33.8 %

GS to GS Q=(2528.8 ± 0.013) keV

 

 

 

 

       

130Te → 130Xe + 2e-     0+ →0+

0nbb rate best fit:   Γ = (-0.2 ± 1.4stat ± 0.3syst) x 10-25 y-1

0nbb half-life limit:  T1/2 > 2.8 x 1024 y (90% C.L.)

 

mbb limit: 

  (R)QRPA (Simkovic et al.): 300-570 meV

  pnQRPA (Civitarese and Suhonen): 360-580 meV

  ISM (Menendez et al.): 570-710 meV

  IBM-2 (Barea and Iachello): 350-370 meV or 370 meV

E. Andreotti et al., Astropart. Phys. 34 (2011) 822



 0+ →0+1  Decay                130Te → 130Xe* + 2e- + (2n) + g

2n mode:  T1/22ν > 1.3×1023 yr (90% C.L.)

0n mode:   T1/20ν > 9.4×1023 yr (90% CL).

E. Andreotti et al., Phys Phys Rev C 85 (2011) 045503




 

     

            120Te Double Beta Decay:                                                  
                                                             natural i.a. 0.096 %                          

                                                             Q = (1714.8 ± 1.3) keV

 0+ →0+1  Decay                130Te → 130Xe* + 2e- + (2n) + g

2n mode:  T1/22ν > 1.9×1021 yr (90% C.L.)

0n mode:    T1/20ν > 7.6×1019 yr (90% CL).



last updated on: 27.10.2012, 22:32 by Maura