Preliminary Results of the MARE Experiment

Ferri, E.; Bagliani, D.; Biassotti, M.; Ceruti, G.; Corsini, D.; Faverzani, M.; Gatti, F.; Giachero, A.; Gotti, C.; Kilbourne, Caroline A.; Kling, A.; Kraft‐Bermuth, S.; Maino, M.; Manfrinetti, P.; Nucciotti, A.; Pessina, G.; Pizzigoni, G.; Gomes, M. L.; Schaeffer, David G.; Sisti, M.

doi:10.1007/s10909-013-1026-z

Cited by 10 publications

(11 citation statements)

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“…At about 2000 K holmium has by many orders of magnitude the highest vapor pressure and therefore will evaporate and deposit onto the substrate that will be used as cathode for the ion source. This process has been already tested successfully in the past years in the framework of the MARE project [39]. Based on this experience a new thermally optimized cell has been designed to be installed in the vacuum chamber.…”

Section: The Holmes Experimentsmentioning

confidence: 99%

Holmes

et al. 2015

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The European Research Council has recently funded HOLMES, a new experiment to directly measure the neutrino mass. HOLMES will perform a calorimetric measurement of the energy released in the decay of Ho. The calorimetric measurement eliminates systematic uncertainties arising from the use of external beta sources, as in experiments with beta spectrometers. This measurement was proposed in 1982 by A. De Rujula and M. Lusignoli, but only recently the detector technological progress allowed to design a sensitive experiment. HOLMES will deploy a large array of low temperature microcalorimeters with implanted Ho nuclei. The resulting mass sensitivity will be as low as 0.4 eV. HOLMES will be an important step forward in the direct neutrino mass measurement with a calorimetric approach as an alternative to spectrometry. It will also establish the potential of this approach to extend the sensitivity down to 0.1 eV. We outline here the project with its technical challenges and perspectives.

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Section: The Holmes Experimentsmentioning

confidence: 99%

Holmes

et al. 2015

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“…Construction of all six vessels is complete. We are taking a phased approach to commissioning the cryostat, having started with the outer three vessels instrumented with three pulse tubes [42]. We cooled down this partial system twice, successfully reaching 3.5 K on the 4 K plate on the second attempt.…”

Section: Cryogenics and Calibration Systemsmentioning

confidence: 99%

Searching for Neutrinoless Double-Beta Decay of¹³⁰Te with CUORE

Artusa

Avignone

Azzolini

et al. 2015

Advances in High Energy Physics

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Neutrinoless double-beta (0νββ) decay is a hypothesized lepton-number-violating process that offers the only known means of asserting the possible Majorana nature of neutrino mass. The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment designed to search for 0νββ decay of 130 Te using an array of 988 TeO 2 crystal bolometers operated at 10 mK. The detector will contain 206 kg of 130 Te and have an average energy resolution of 5 keV; the projected 0νββ decay half-life sensitivity after five years of live time is 1.6 × 10 26 y at 1σ (9.5 × 10 25 y at the 90% confidence level), which corresponds to an upper limit on the effective Majorana mass in the range 40-100 meV (50-130 meV). In this paper we review the experimental techniques used in CUORE as well as its current status and anticipated physics reach.

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“…A few samples have been irradiated at the Portuguese Nuclear Reactor (RPI) at the Nuclear and Technological Institute, Instituto Superior Técnico, IST-ID in Lisbon. These samples have been used for investigating differen methods for the production of detector absorbers with embedded 163 Ho [27].…”

Section: Holmesmentioning

confidence: 99%

“…Preliminary tests have been performed to prepare metallic targets containing 163 Ho starting from a liquid solution. It has been demonstrated that a thermo-reduction process using yttrium as reductant followed by distillation using a tantalum Knudsen cell leads to film where 80% of the holmium present in the cell is in metallic form [27].…”

Section: Holmesmentioning

confidence: 99%

163Ho based experiments

Gastaldo¹

2015

AIP Conference Proceedings

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Abstract. The analysis of the endpoint region of the calorimetrically measured 163 Ho electron capture spectrum is a very promising way to determine the mass of the electron neutrino. The achievable sensitivity of 163 Ho-based experiments and the experimental challenges will be presented. Three large collaborations aim at developing large scale experiments able to reach sub-eV sensitivity. Presently pilot experiments are performed to demonstrate the possibility to calorimetrically measure high precision and high statistics 163 Ho spectra. The different approaches as well as the state of the art of the experimental efforts for the three collaborations will be discussed.

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Preliminary Results of the MARE Experiment

Cited by 10 publications

References 11 publications

Holmes

Holmes

Searching for Neutrinoless Double-Beta Decay of¹³⁰Te with CUORE

163Ho based experiments

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Preliminary Results of the MARE Experiment

Cited by 10 publications

References 11 publications

Holmes

Holmes

Searching for Neutrinoless Double-Beta Decay of130Te with CUORE

163Ho based experiments

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Searching for Neutrinoless Double-Beta Decay of¹³⁰Te with CUORE