Publications (12)13.31 Total impact
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Article: New CUORICINO results and status of CUORE
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ABSTRACT: CUORICINO is an array of 62 TeO2 bolometers with a total mass of 40.7 kg (11.2 kg of 130Te), operated at about 10 mK to search for ββ(0ν) of 130Te. The detectors are organized as a 14-story tower and intended as a slightly modified version of one of the 19 towers of the CUORE project, a proposed tightly packed array of 988 TeO2 bolometers (741 kg of total mass of TeO2) for ultralow-background searches on neutrinoless double-beta decay, cold dark matter, solar axions, and rare nuclear decays. Started in April 2003 at the Laboratori Nazionali del Gran Sasso (LNGS), CUORICINO data taking was stopped in November 2003 to repair the readout wiring system of the 62 bolometers. Restarted in spring 2004, CUORICINO is presently the most sensitive running experiment on neutrinoless double-beta decay. No evidence for ββ(0ν) decay has been found so far and a new lower limit, T 1 2/0ν ≥ 1.8 × 1024 yr (90% C.L.), is set, corresponding to 〈m ν〉 ≤ 0.2–1.1 eV, depending on the theoretical nuclear matrix elements used in the analysis. Detector performance, operational procedures, and background analysis results are reviewed. The expected performance and sensitivity of CUORE is also discussed.Physics of Atomic Nuclei 11/2006; 69(12):2083-2089. · 0.57 Impact Factor -
Article: Measurement of the p to s wave branching ratio of 187Re beta decay from beta environmental fine structure.
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ABSTRACT: The mixed occurrence of s-wave and p-wave contributions in a first forbidden unique Gamow-Teller beta decay has been investigated for the first time by measuring the beta environmental fine structure (BEFS) in a 187Re crystalline compound. The experiment has been carried out with an array of eight AgReO4 thermal detectors operating at a temperature of approximately 100 mK. A fit of the observed BEFS spectrum indicates the p-wave electron emission as the dominant channel. The complete understanding of the BEFS distortion of the 187Re beta decay spectrum is crucial for future experiments aiming at the precise calorimetric measurement of the antineutrino mass.Physical Review Letters 03/2006; 96(4):042503. · 7.37 Impact Factor -
Article: Cuoricino and CUORE detectors: Developing big arrays of large mass bolometers for rare events physics
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ABSTRACT: Cited By (since 1996): 3Nuclear Physics B - Proceedings Supplements 01/2006; 150:214-218. · 0.88 Impact Factor -
Article: The microcalorimeter arrays for a rhenium experiment (MARE): A next-generation calorimetric neutrino mass experiment
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ABSTRACT: Neutrino oscillation experiments have proved that neutrinos are massive particles, but cannot determine their absolute mass scale. Therefore the neutrino mass is still an open question in elementary particle physics. An international collaboration is growing around the project of Microcalorimeter Arrays for a Rhenium Experiment (MARE) for directly measuring the neutrino mass with a sensitivity of about 0.2 eV/c2. Many groups are joining their experiences and technical expertise in a common effort towards this challenging experiment. We discuss the different scenarios and the impact of MARE as a complement of KATRIN.Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 09/2005; -
Article: First results of the CUORICINO experiment
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ABSTRACT: Cited By (since 1996): 1Nuclear Physics B - Proceedings Supplements 01/2005; 138:210-213. · 0.88 Impact Factor -
Article: First results on neutrinoless double beta decay of <sup>130</sup>Te with the calorimetric CUORICINO experiment
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ABSTRACT: Cited By (since 1996): 50Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 01/2004; 584:260-268. -
Article: CUORICINO: A new large bolometer array for astroparticle physics
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ABSTRACT: Cited By (since 1996): 2Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 01/2004; 518:256-258. · 1.21 Impact Factor -
Article: Further developments in the CUORICINO experiment
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ABSTRACT: We report the present results of the CUORICINO experiment, a cryogenic experiment on neutrinoless Double Beta Decay (DBD) of 130Te consisting of an array of crystals with a total active mass of . The array is framed inside a dilution refrigerator, heavily shielded against environmental radioactivity and high-energy neutrons, and it is operated at a temperature of in the Gran Sasso Underground Laboratory. After several improvements the live time of the experiment is near 75%.Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 559(2):352-354. · 1.21 Impact Factor -
Article: Comparison between implanted Si and NTD-Ge thermistors performance in AgReO4microcalorimeters for a new neutrino mass experiment
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ABSTRACT: We report here the preliminary results of the R&D for a new neutrino mass experiment. This experiment is prepared in the framework of the Microcalorimeters Arrays for a Rhenium Experiment (MARE) project. First tests were made on silicon implanted and germanium NTD arrays with AgReO4 crystals.Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 559(2):367-369. · 1.21 Impact Factor -
Article: The CUORICINO and CUORE double beta decay experiments
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ABSTRACT: After an introduction on the various experimental techniques to be adopted in searches for double beta decay, the new approach based on the use of cryogenic low temperature detectors is described. The present results are reported on the limit for neutrinoless double beta decay of 130Te obtained with the large bolometric detector CUORICINO. This setup consists of 44 cubic crystals of natural TeO2 with 5 cm sides and 18 crystals of 3×3×6 cm3. Four of these latter crystals are made with isotopically enriched materials: two in 128Te and two others in 130Te. With a sensitive mass of 40.7 kg, this array is by far the most massive running cryogenic detector. The array is operated at a temperature of ∼10 mK in a dilution refrigerator under a heavy shield in the Gran Sasso Underground Laboratory at a depth of about 3500 m.w.e. The counting rate in the region of neutrinoless double beta decay is 0.18±0.02 counts keV −1 kg−1 y−1, among the lowest in this type of experiment. No evidence for neutrinoless double beta decay is found. The corresponding lower limit for the lifetime of this process is 2×1024 years at 90% C.L. The resultant upper limit on the effective neutrino mass ranges between 0.2 and 1.0 eV, depending on the theoretically calculated nuclear matrix elements. This constraint is the most restrictive one, except for those obtained with Ge diodes, and is comparable to them. The second part of this report is devoted to the present status of the construction of the larger experiment CUORE (Cryogenic Underground Observatory for Rare Events) formed from 988 bolometers with a cubic TeO2 absorber of size 5×5×5 cm3, with a total mass of ∼750 kg. We present technical details of the CUORE setup as well as of its location and our efforts to reduce radioactive backgrounds.Progress in Particle and Nuclear Physics. -
Article: First results on neutrinoless double beta decay of 130Te with the calorimetric CUORICINO experiment
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ABSTRACT: The first results are reported on the limit for neutrinoless double decay of 130Te obtained with the new bolometric experiment CUORICINO. The set-up consists of 44 cubic crystals of natural TeO2, 5 cm on the side and 18 crystals of 3×3×6 cm3. Four of these latter crystals are made with isotopically enriched materials: two in 128Te and two others in 130Te. With a sensitive mass of ∼40 kg, our array is by far the most massive running cryogenic detector to search for rare events. The array is operated at a temperature of ∼10 mK in a dilution refrigerator under a heavy shield in the Gran Sasso Underground Laboratory at a depth of about 3500 m.w.e. The counting rate in the region of neutrinoless double beta decay is ∼0.2 counts keV−1 kg−1 y−1, among the lowest in this type of experiment. No evidence for neutrinoless double beta decay is found with the present statistics obtained in about three months with a live time of 72%. The corresponding lower limit for the lifetime of this process is of 5.5×1023 years at 90% C.L. The corresponding limit for the effective neutrino mass ranges between 0.37 to 1.9 eV depending on the theoretically calculated nuclear matrix elements used. This constraint is the most restrictive one except those obtained with Ge diodes, and is comparable to them.Physics Letters B. -
Article: CUORICINO status and CUORE prospects
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ABSTRACT: CUORE is a proposed experiment, already partially funded, to search for 0ν-DBD of 130Te using 988 TeO2 bolometers. It aims at reaching a sensitivity on the effective neutrino mass of the order of few tens of meV. The crucial parameter on which this expectation is based is background. Different strategies are under development to reduce as much as possible its value, among which the comprehension of CUORICINO background, a single CUORE tower running since 2003, plays an important role. Present results already achieved and studies that are underway are here presented and discussed.Nuclear Physics B - Proceedings Supplements.
