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CUORE
Physics with CUORE [ref]
| Background goal in 0νββ region of interest | 0.01 counts/keV/kg/yr |
| Expected energy resolution | 5 keV at 2615 keV |
| Expected sensitivity to 0νββ | T1/2 = 9.5 × 1025 yr in 5 years (90% C.L.) |
CUORE Detectors [ref]
| Number of bolometers | 988, arranged into 19 towers with 13 floors of 4 crystals each |
| Detector composition | TeO2 crystals, with natural isotopic abundance of tellurium |
| Crystal dimensions | 5 × 5 × 5 cm3 |
| Detector mass | 742 kg, with 206 kg of130Te |
CUORE Cryostat [ref]
| Configuration | Dilution refrigerator with pulse tube cryocoolers |
| Internal shielding | Roman lead shield on sides and below detector, and modern low-radioactivity lead shield above detector |
| External shielding | Modern low-radioactivity lead shield and borated polyethylene neutron shield |
CUORE-0
Physics with CUORE-0 [ref]
| 0νββ half-life limit | T1/2 > 2.7 × 1024 yr (90% C.L.) |
| 0νββ half-life limit (with Cuoricino) | T1/2 > 4.0 × 1024 yr (90% C.L.) |
| Effective Majorana neutrino mass limit (with Cuoricino) | mββ < 270–760 meV (90% C.L.) |
| Energy resolution in 0νββ region of interest | 5.1 ± 0.3 keV FWHM |
| Background level in 0νββ region of interest | 0.058 ± 0.004 (stat.) ± 0.002 (syst.) counts/keV/kg/yr |
| Final isotopic (130Te) exposure | 9.8 kg yr |
CUORE-0 Detectors [ref]
| Number of bolometers | 52, arranged into 1 tower with 13 floors of 4 crystals each |
| Detector composition | TeO2 crystals, with natural isotopic abundance of tellurium |
| Crystal dimensions | 5 × 5 × 5 cm3 |
| Instrumented detector mass | 39.1 kg, with 10.9 kg of130Te |
CUORE-0 Cryostat [ref]
| Configuration | Dilution refrigerator |
| Internal shielding | Roman lead shield cylindrical shield around detector and disks above and below the detector |
| External shielding | Modern low-radioactivity lead shield, borated polyethylene neutron shield, and acrylic anti-radon box flushed with nitrogen gas |
Cuoricino
Physics with Cuoricino [ref]
| 0νββ half-life limit | T1/2 > 2.8 × 1024 yr (90% C.L.) |
| Effective Majorana neutrino mass limit | mββ < 300–710 meV (90% C.L.) |
| Energy resolution in 0νββ region of interest | 6.3 ± 2.5 keV FWHM for 5 × 5 × 5 cm3 crystals |
| Background level in 0νββ region of interest | 0.169 ± 0.006 counts/keV/kg/yr |
| Final isotopic (130Te) exposure | 19.75 kg yr |
Cuoricino Detectors
| Number of bolometers | 62, arranged into 11 floors of four 5 × 5 × 5 cm3 crystals each and 2 floors of nine 3 × 3 × 6 cm3 crystals each. |
| Detector composition | All the TeO2 crystals feature natural isotopic abundance of tellurium, with the exception of two 3 × 3 × 6 cm3 crystals enriched in130Te (82%) and two 3 × 3 × 6 cm3 crystals enriched in128Te (75%) |
Bolometers
| Detector working temperature | T ≈ 10 mK |
| Crystal heat capacity | C ≈ 2 × 10-9 J/K at 10 mK |
| Thermal coupling of crystal to heat bath | G ≈ 2 × 10-9 W/K at 10 mK |
| Bolometer time constant | τ = C/G ≈ 1 s at 10 mK |
| Thermistor resistance | R ≈ 100 MΩ at 10 mK |
| Typical pulse rise time | t ≈ 0.05 s |
| Typical pulse decay time | t ≈ 0.2 s |
| Thermistor voltage signal | ΔV ≈ 0.3 mV/MeV |
| Crystal temperature rise | ΔTcrystal ≈ 0.1 mK/MeV |
130Te
| 0νββ decayQ-value | 2527.515 ± 0.013 keV [ref][ref][ref] |
| 130Te isotopic abundance | 34.167% [ref] |
| 130Te atomic mass | 129.9062244 ± 0.0000021 u [ref] |
| Expected 0νββ half-life for mββ =50 meV | T1/2 = 1.0–5.6 × 1026 yr |