S. Sangiorgio
A5017138681- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Superconducting and THz Device Technology
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Nuclear physics research studies
- Superconducting Materials and Applications
- Radioactive contamination and transfer
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Particle accelerators and beam dynamics
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Atmospheric Ozone and Climate
- Radioactivity and Radon Measurements
- Astronomy and Astrophysical Research
- Medical Imaging Techniques and Applications
- Methane Hydrates and Related Phenomena
Lawrence Livermore National Laboratory
2015-2024
Lawrence Livermore National Security
2024
Colorado School of Mines
2022
Abilene Christian University
2017-2021
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2011-2021
Triangle Universities Nuclear Laboratory
2019
Duke University
2019
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017
University of Wisconsin–Madison
2008-2016
Ohio University
2014
We report the results of a search for neutrinoless double-beta decay in 9.8 kg yr exposure (130)Te using bolometric detector array, CUORE-0. The characteristic energy resolution and background level region interest are 5.1±0.3 keV FWHM 0.058±0.004(stat)±0.002(syst)counts/(keV yr), respectively. median 90% C.L. lower-limit half-life sensitivity experiment is 2.9×10(24) surpasses previous searches. find no evidence place Bayesian lower bound on half-life, T(1/2)(0ν)>2.7×10(24) at Combining...
We report new results from the search for neutrinoless double-beta decay in $^{130}$Te with CUORE detector. This benefits a four-fold increase exposure, lower trigger thresholds and analysis improvements relative to our previous results. observe background of $(1.38\pm0.07)\cdot10^{-2}$ counts$/($keV$\cdot$kg$\cdot$yr$)$ $0\nu\beta\beta$ region interest and, total exposure 372.5 kg$\cdot$yr, we attain median exclusion sensitivity $1.7\cdot10^{25}$ yr. find no evidence set $90\%$ CI Bayesian...
Abstract The possibility that neutrinos may be their own antiparticles, unique among the known fundamental particles, arises from symmetric theory of fermions proposed by Ettore Majorana in 1937 1 . Given profound consequences such neutrinos, which is a potential explanation for matter–antimatter asymmetry universe via leptogenesis 2 , nature commands intense experimental scrutiny globally; one primary probes neutrinoless double beta (0 νββ ) decay. Here we show results search 0 decay 130...
A detailed description of the CUORICINO $^{130}\mathrm{Te}$ neutrinoless double-beta $(0 \ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta})$ decay experiment is given and recent results are reported. an array 62 tellurium oxide (${\mathrm{TeO}}_{2}$) bolometers with active mass 40.7 kg. It cooled to $~8\text{\ensuremath{-}}10$ mK by a dilution refrigerator shielded from environmental radioactivity energetic neutrons. running in Laboratori Nazionali del Gran Sasso (LNGS) Assergi, Italy....
Neutrinoless double-beta (0<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math>) decay is a hypothesized lepton-number-violating process that offers the only known means of asserting possible Majorana nature neutrino mass. The Cryogenic Underground Observatory for Rare Events (CUORE) an upcoming experiment designed to search 0<mml:math id="M2"><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math>decay...
We have measured the scintillation and ionization yield of recoiling nuclei in liquid argon as a function applied electric field by exposing dual-phase time projection chamber (LAr-TPC) to low energy pulsed narrow band neutron beam produced at Notre Dame Institute for Structure Nuclear Astrophysics. Liquid counters were arranged detect identify neutrons scattered TPC select nuclei. report measurements yields nuclear recoils with energies from 10.3 57.3 keV median fields 0 $970\text{ }\text{...
Neutrinoless double beta decay ( $$0\nu \beta $$ ) is one of the most sensitive probes for physics beyond Standard Model, providing unique information on nature neutrinos. In this paper we review status and outlook bolometric searches. We summarize recent advances in background suppression demonstrated using bolometers with simultaneous readout heat light signals. simulate several configurations a future CUORE-like bolometer array which would utilize these improvements present sensitivity...
We describe in detail the methods used to obtain lower bound on lifetime of neutrinoless double-beta ($0\nu\beta\beta$) decay $^{130}$Te and associated limit effective Majorana mass neutrino using CUORE-0 detector. is a bolometric detector array located at Laboratori Nazionali del Gran Sasso that was designed validate background reduction techniques developed for CUORE, next-generation experiment scheduled come online 2016. also competitive $0\nu\beta\beta$ search its own right functions as...
We measured two-neutrino double beta decay of $^{130}\mathrm{Te}$ using an exposure 300.7 kg yr accumulated with the CUORE detector. Using a Bayesian analysis to fit simulated spectra experimental data, it was possible disentangle all major background sources and precisely measure contribution. The half-life is in agreement past measurements strongly reduced uncertainty:...
The first results are reported on the limit for neutrinoless double decay of 130Te obtained with new bolometric experiment CUORICINO. set-up consists 44 cubic crystals natural TeO2, 5 cm side and 18 3×3×6 cm3. Four these latter made isotopically enriched materials: two in 128Te others 130Te. With a sensitive mass ∼40 kg, our array is by far most massive running cryogenic detector to search rare events. operated at temperature ∼10 mK dilution refrigerator under heavy shield Gran Sasso...
We report the present results of CUORICINO, a search for neutrinoless double-beta (0nu betabeta) decay 130Te. The detector is an array 62 TeO2 bolometers with total active mass 40.7 kg. cooled by dilution refrigerator shielded from environmental radioactivity and energetic neutrons, operated at approximately 8 mK in Gran Sasso Underground Laboratory. No evidence was found new lower limit, T(1/2)(0nu) > or = 1.8 x 10(24) yr (90% C.L.) set, corresponding to [m(nu)] < 0.2 1.1 eV, depending on...
CUORE-0 is a cryogenic detector that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay ^{130}Te. We present the first data analysis with 7.1 kg y total TeO_2 exposure focusing on background measurements and energy resolution. The rates in region interest (2.47 2.57 MeV) {\alpha} background-dominated (2.70 3.90 have been measured be 0.071 \pm 0.011 0.019 0.002 counts/keV/kg/y, respectively. latter result represents factor 6 improvement from predecessor...
This Letter details a measurement of the ionization yield (${Q}_{y}$) 6.7 keV $^{40}\mathrm{Ar}$ atoms stopping in liquid argon detector. The ${Q}_{y}$ 3.6--6.3 detected ${e}^{\ensuremath{-}}/\mathrm{keV}$, for applied electric fields range $240--2130\text{ }\text{ }\mathrm{V}/\mathrm{cm}$, is encouraging use this detector medium to search signals from hypothetical dark matter particle interactions and coherent elastic neutrino-nucleus scattering. A significant dependence on field observed...
Large detectors employing xenon are a leading technology in existing and planned searches for new physics, including neutrinoless double beta decay ($0\nu\beta\beta$) dark matter. While upcoming will employ target masses of ton or more, further extending gas liquid phase Xe to the kton scale would enable extremely sensitive next-generation rare phenomena. The key challenge this well beyond is acquisition itself. We describe motivation time projection chambers (TPCs) possible avenues that...
We report the results of a search for axions from 14.4 keV M1 transition 57Fe in core sun using axio-electric effect TeO2 bolometers. The detectors are 5 × cm3 crystals operated at about 10 mK facility used to test bolometers CUORE experiment Laboratori Nazionali del Gran Sasso Italy. An analysis 43.65 kg⋅d data was made newly developed low energy trigger which optimized reduce threshold detector. upper limit 0.58 c⋅kg−1⋅d−1 is established 95% C.L., translates into lower bounds fA ⩾ 3.12 105...