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Search Results: 1 - 10 of 335901 matches for " S. Di Domizio "
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Una experiencia de educación permanente en Barrios Periféricos de la ciudad de La Plata . Programa de Educación Permanente de Adultos Mayores
Débora Paola Di Domizio
Palabras Mayores , 2012,
Abstract: El objetivo de este artículo es narrar una experiencia educativa con adultos mayores. Describiremos las particularidades de la cultura organizacional de los espacios públicos donde se desarrollan los talleres, las dificultades que se presentan y las vinculaciones que se pueden establecer con el ejercicio de la ciudadanía. No obstante, el énfasis del proyecto reside en el hecho de que aquellos adultos mayores debajos recursos puedan acceder a distintas actividades educativas de manera gratuita. Se pretende democratizar el acceso a la educación y garantizar el incremento del capital cultural y social de los sujetos participantes. Asimismo, pueden esbozarse otros desafíos que podrían pensarse en relación con estas propuestas, teniendo en cuenta los mandatos fundacionales de los programas universitarios del país. El Proyecto Pepam en Barrios Platenses ubica a los adultos mayores en un rol protagónico, como sujetos activos y con capacidad para trasformar su vida y su entorno social.
ángeles Soler Vila. Practicar ejercicio físico en la vejez. Una intervención preventivo-educativa para lograr envejecer saludablemente. Barcelona: Editorial Inde, 2009. 239 pp.
Débora Paola Di Domizio
Palabras Mayores , 2012,
Abstract: El libro Practicar ejercicio físico en la vejez. Una intervención preventivo-educativa para lograr envejecer saludablemente, se organiza en cuatro grandes capítulos y una extensa y minuciosa bibliografía que se presenta en cuantiosas páginas. El primer capítulo se denomina Envejecimiento saludable. El segundo capítulo, Efectos de la actividad física y del ejercicio físico en la salud y bienestar de las personas mayores. El tercero se titula Programa sociomotriz para personas mayores. Criterios de aplicación. Por último, el cuarto capítulo se llama Tareas y ejercicios.
Discrimination of alpha and beta/gamma interactions in a TeO$_2$ bolometer
J. W. Beeman,F. Bellini,L. Cardani,N. Casali,I. Dafinei,S. Di Domizio,F. Ferroni,F. Orio,G. Pessina,S. Pirro,C. Tomei,M. Vignati
Physics , 2011, DOI: 10.1016/j.astropartphys.2011.12.004
Abstract: TeO$_2$ crystals have proven to be superb bolometers for the search of neutrinoless double beta decay in many respects. However, if used alone, they do not exhibit any feature that allows to discriminate an alpha energy deposit from a beta/gamma one. This fact limits their ability to reject the background due to natural radioactivity and eventually affects the sensitivity of the search. In this paper we show the results of a TeO$_2$ crystal where, in coincidence with its bolometric heat signal, also the luminescence light escaping the crystal is recorded. The results show that we are able to measure the light produced by beta/gamma particles, which can be explained as due to Cerenkov emission. No light is detected from alpha particles, allowing the rejection of this background source.
Energy resolution and efficiency of phonon-mediated Kinetic Inductance Detectors for light detection
L. Cardani,I. Colantoni,A. Cruciani,S. Di Domizio,M. Vignati,F. Bellini,N. Casali,M. G. Castellano,A. Coppolecchia,C. Cosmelli,C. Tomei
Physics , 2015, DOI: 10.1063/1.4929977
Abstract: The development of sensitive cryogenic light detectors is of primary interest for bolometric experiments searching for rare events like dark matter interactions or neutrino-less double beta decay. Thanks to their good energy resolution and the natural multiplexed read-out, Kinetic Inductance Detectors (KIDs) are particularly suitable for this purpose. To efficiently couple KIDs-based light detectors to the large crystals used by the most advanced bolometric detectors, active surfaces of several cm$^2$ are needed. For this reason, we are developing phonon-mediated detectors. In this paper we present the results obtained with a prototype consisting of four 40 nm thick aluminum resonators patterned on a 2$\times$2 cm$^2$ silicon chip, and calibrated with optical pulses and X-rays. The detector features a noise resolution $\sigma_E=154\pm7$ eV and an (18$\pm$2)$\%$ efficiency.
Lowering the energy threshold of large-mass bolometric detectors
Sergio Di Domizio,Filippo Orio,Marco Vignati
Physics , 2010, DOI: 10.1088/1748-0221/6/02/P02007
Abstract: Large-mass bolometers are used in particle physics experiments to search for rare processes. The energy threshold of such detectors plays a critical role in their capability to search for dark matter interactions and rare nuclear decays. We have developed a trigger and a pulse shape algorithm based on the matched filter technique which, when applied to data from test bolometers of the CUORE experiment, lowered the energy threshold from tens of keV to the few keV region. The detection efficiency is in excess of 80%, and nearly all nonphysical pulses are rejected.
A BGO scintillating bolometer for gamma and alpha spectroscopy
Laura Cardani,Sergio Di Domizio,Luca Gironi
Physics , 2012,
Abstract: A 891 g BGO scintillating bolometer has been tested at 10 mK in the underground Laboratori Nazionali del Gran Sasso (Italy). The discrimination capability, the radio-purity of the compound and the main features of the crystal have been studied in order to demonstrate the excellent performances obtained by operating a scintillating bolometer in the field of gamma and alpha spectroscopy. The sensitivity of this detector in the study of extremely low surface contaminations has been investigated.
New experimental limits on the alpha decays of lead isotopes
J. W. Beeman,F. Bellini,L. Cardani,N. Casali,S. Di Domizio,E. Fiorini,L. Gironi,S. S. Nagorny,S. Nisi,F. Orio,L. Pattavina,G. Pessina,G. Piperno,S. Pirro,E. Previtali,C. Rusconi,C. Tomei,M. Vignati
Physics , 2012, DOI: 10.1140/epja/i2013-13050-7
Abstract: For the first time a PbWO4 crystal was grown using ancient Roman lead and it was run as a cryogenic detector. Thanks to the simultaneous and independent read-out of heat and scintillation light, the detector was able to discriminate beta/gamma interactions with respect to alpha particles down to low energies. New more stringent limits on the alpha decays of the lead isotopes are presented. In particular a limit of T_{1/2} > 1.4*10^20 y at a 90% C.L. was evaluated for the alpha decay of 204Pb to 200Hg.
TeO$_2$ bolometers with Cherenkov signal tagging: towards next-generation neutrinoless double beta decay experiments
N. Casali,M. Vignati,J. W. Beeman,F. Bellini,L. Cardani,I. Dafinei,S. Di Domizio,F. Ferroni,L. Gironi,S. Nagorny,F. Orio,L. Pattavina,G. Pessina,G. Piperno,S. Pirro,C. Rusconi,K. Sch?ffner,C. Tomei
Physics , 2014, DOI: 10.1140/epjc/s10052-014-3225-4
Abstract: CUORE, an array of 988 TeO$_2$ bolometers, is about to be one of the most sensitive experiments searching for neutrinoless double-beta decay. Its sensitivity could be further improved by removing the background from $\alpha$ radioactivity. A few years ago it has been pointed out that the signal from $\beta$s can be tagged by detecting the emitted Cherenkov light, which is not produced by $\alpha$s. In this paper we confirm this possibility. For the first time we measured the Cherenkov light emitted by a CUORE crystal, and found it to be 100 eV at the $Q$-value of the decay. To completely reject the $\alpha$ background, we compute that one needs light detectors with baseline noise below 20 eV RMS, a value which is 3-4 times smaller than the average noise of the bolometric light detectors we are using. We point out that an improved light detector technology must be developed to obtain TeO$_2$ bolometric experiments able to probe the inverted hierarchy of neutrino masses.
Performances of a large mass ZnSe bolometer to search for rare events
J. W. Beeman,F. Bellini,L. Cardani,N. Casali,I. Dafinei,S. Di Domizio,F. Ferroni,L. Gironi,A. Giuliani,S. Nagorny,F. Orio,L. Pattavina,G. Pessina,G. Piperno,S. Pirro,E. Previtali,C. Rusconi,C. Tomei,M. Vignati
Physics , 2013, DOI: 10.1088/1748-0221/8/05/P05021
Abstract: Scintillating bolometers of ZnSe are the baseline choice of the LUCIFER experiment, whose aim is to observe the neutrinoless double beta decay of 82Se. The independent read-out of the heat and scintillation signals allows to identify and reject alpha particle interactions, the dominant background source for bolometric detectors. In this paper we report the performances of a ZnSe crystal operated within the LUCIFER R&D. We measured the scintillation yield, the energy resolution and the background in the energy region where the signal from neutrinoless double beta decay of 82Se is expected with an exposure of 9.4 kg x days. With a newly developed analysis algorithm we improved the rejection of alpha events, and we estimated the increase in energy resolution obtained by the combination of the heat and light signals. For the first time we measured the light emitted by nuclear recoils, and found it to be compatible with zero. We conclude that the discrimination of nuclear recoils from beta/gamma interactions in the WIMPs energy region is possible, but low-noise light detectors are needed.
Characterization of bolometric Light Detectors for rare event searches
J. W. Beeman,F. Bellini,N. Casali,L. Cardani,I. Dafinei,S. Di Domizio,F. Ferroni,L. Gironi,S. Nagorny,F. Orio,L. Pattavina,G. Pessina,G. Piperno,S. Pirro,E. Previtali,C. Rusconi,C. Tomei,M. Vignati
Physics , 2013, DOI: 10.1088/1748-0221/8/07/P07021
Abstract: Bolometers have proven to be very good detectors to search for rare processes thanks to their excellent energy resolution and their low intrinsic background. Further active background rejection can be obtained by the simultaneous readout of the heat and light signals produced by particles interacting in scintillating bolometers, as proposed by the LUCIFER experiment. In this framework, the choice of the light detector and the optimization of its working conditions play a crucial role. In this paper, we report a study of the performances of a Germanium bolometric light detector in terms of signal amplitude, energy resolution and signal time development. The impact of various operational parameters on the detector performances is discussed.
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