Download or read book Measurement of the Two neutrino Double beta Decay Half life of Te with the CUORE 0 Experiment written by and published by . This book was released on 2017 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we report on the measurement of the two-neutrino double-beta decay half-life of 130Te with the CUORE-0 detector. From an exposure of 33.4 kg year of TeO2, the half-life is determined to be T2[nu]1/2 = [8.2 ± 0.2 (stat.) ± 0.6 (syst.)] × 1020 year. This result is obtained after a detailed reconstruction of the sources responsible for the CUORE-0 counting rate, with a specific study of those contributing to the 130Te neutrinoless double-beta decay region of interest.
Download or read book Background Model and a Measurement of the 2nbb Decay Rate in 130Te with CUORE 0 written by Xiaoyu Zhu and published by . This book was released on 2016 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: CUORE is a ton-scale cryogenic bolometer experiment designed to search for neutrinoless double beta decay ($0\nu\beta\beta$) in $^{130}$Te. CUORE-0 was a single array experiment consisting of 11 kg of $^{130}$Te and was designed to test the detector construction and analysis techniques for CUORE. CUORE-0 operated from 2013 to 2015 in the Laboratori Nazionali del Gran Sasso in Italy and collected a data sample of 9.8 kg$\cdot$yr of $^{130}$Te. This dissertation will focus on a method for reconstructing the background spectrum and extracting the two neutrino double beta decay ($2\nu\beta\beta$) signal of $^{130}$Te in CUORE-0. Identifying and reducing the most significant background contributions are keys to improving the sensitivity of future $0\nu\beta\beta$ experiments. The background spectrum of CUORE-0 was fit using the spectra of radioactive contaminants generated by Monte Carlo simulations and the $2\nu\beta\beta$ half-life was measured to be $T^{2\nu}_{1/2} = (8.27^{+1.38}_{-0.99} \text{(stat+syst)})\times10^{20} \text{ yr}$
Download or read book A Measurement of the 2 Neutrino Double Beta Decay Rate of Te 130 in the CUORICINO Experiment written by and published by . This book was released on 2011 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: CUORICINO was a cryogenic bolometer experiment designed to search for neutrinoless double beta decay and other rare processes, including double beta decay with two neutrinos (2v[beta][beta]). The experiment was located at Laboratori Nazionali del Gran Sasso and ran for a period of about 5 years, from 2003 to 2008. The detector consisted of an array of 62 TeO2 crystals arranged in a tower and operated at a temperature of 10 mK. Events depositing energy in the detectors, such as radioactive decays or impinging particles, produced thermal pulses in the crystals which were read out using sensitive thermistors. The experiment included 4 enriched crystals, 2 enriched with 130Te and 2 with 128Te, in order to aid in the measurement of the 2v[beta][beta] rate. The enriched crystals contained a total of 350 g 130Te. The 128-enriched (130-depleted) crystals were used as background monitors, so that the shared backgrounds could be subtracted from the energy spectrum of the 130- enriched crystals. Residual backgrounds in the subtracted spectrum were fit using spectra generated by Monte-Carlo simulations of natural radioactive contaminants located in and on the crystals. The 2v[beta][beta] half-life was measured to be T2v1/2 = [9.81± 0.96(stat)± 0.49(syst)] x1020 y.
Download or read book Model of the Response Function of CUORE Bolometers written by Marco Vignati and published by Springer Science & Business Media. This book was released on 2011-04-29 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large mass bolometers are used in particle physics experiments to search for rare processes, like neutrinoless double beta decay and dark matter interactions. In the next years the CUORE experiment (a 1 Ton detector composed by 1000 crystals of TeO2 operated as bolometers in a large cryostat at 10mK) will be the particle physics experiment with the highest chance of discovering the Majorana neutrino, a long standing and yet fundamental question of particle physics. The study presented in this book was performed on the bolometers of the CUORE experiment. The response function of these detectors is not linear in the energy range of interest, and it changes with the operating temperature, worsening the performances. The nonlinearity appeared to be dominated by the thermistor and the biasing circuit used to read the bolometer, and was modeled using few measurable parameters. A method to obtain a linear response is the result of this work. It allows a great improvement of the detector operation and data analysis. With a foreword by Fernando Ferroni.
Download or read book Event Classification in Liquid Scintillator Using PMT Hit Patterns written by Jack Dunger and published by Springer Nature. This book was released on 2019-11-13 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for neutrinoless double beta decay is one of the highest priority areas in particle physics today; it could provide insights to the nature of neutrino masses (currently not explained by the Standard Model) as well as how the universe survived its early stages. One promising experimental approach involves the use of large volumes of isotope-loaded liquid scintillator, but new techniques for background identification and suppression must be developed in order to reach the required sensitivity levels and clearly distinguish the signal. The results from this thesis constitute a significant advance in this area, laying the groundwork for several highly effective and novel approaches based on a detailed evaluation of state-of-the-art detector characteristics. This well written thesis includes a particularly clear and comprehensive description of the theoretical motivations as well as impressively demonstrating the effective use of diverse statistical techniques. The professionally constructed signal extraction framework contains clever algorithmic solutions to efficient error propagation in multi-dimensional space. In general, the techniques developed in this work will have a notable impact on the field.
Download or read book Measurement of the Double Beta Decay Half life of sup 136 Xe in KamLAND Zen written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from the KamLAND-Zen double-beta decay experiment based on an exposure of 77.6 days with 129 kg of 136Xe. The measured two-neutrino double-beta decay half-life of 136Xe is T{sup 2[nu]}{sub 1/2} = 2:38 ± 0:02(stat) ±0.14(syst) x1021 yr, consistent with a recent measurement by EXO-200. We also obtain a lower limit for the neutrinoless double-beta decay half-life, T{sup 0[nu]}{sub 1/2}> 5.7 x 1024 yr at 90% C.L.
Download or read book Solar Neutrinos Proceedings Of The 5th International Solar Neutrino Conference written by Meyer Mikko and published by World Scientific. This book was released on 2019-04-26 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2018 solar physics and neutrino research celebrated various historical highlight events. Among them were 80 years of the paper by Hans Bethe discussing solar fusion cycles as energy source of stars, the first results from the Homestake chlorine experiment celebrating 50 years as well as the discovery of neutrino oscillations 20 years ago by Super-Kamiokande. Since the last International Solar Neutrino Conference in 1997, solar neutrino detection was recognized by two Nobel Prizes, given to Raymond Davis Jr. (2002) and Arthur McDonald (2015).The present proceedings volume is based on the given talks and provides a comprehensive and detailed overview of recent developments and discoveries in the field of solar neutrino physics. Articles were written by renowned experts of their field and cover a wide range in experiments and theory from current and future solar neutrino measurements, elemental abundances, nuclear astrophysics, helioseismology, impact on general neutrino physics and more. Further contributions focus on experiments like Homestake, SAGE and GALLEX which are widely known as historic milestones in the field of solar neutrino physics.
Download or read book A Measurement of the 2 Neutrino Double Beta Decay Rate of 130Te in the CUORICINO Experiment written by Laura Katherine Kogler and published by . This book was released on 2011 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: CUORICINO was a cryogenic bolometer experiment designed to search for neutrinoless double beta decay and other rare processes, including double beta decay with two neutrinos (2v beta beta). The experiment was located at Laboratori Nazionali del Gran Sasso and ran for a period of about 5 years, from 2003 to 2008. The detector consisted of an array of 62 TeO2 crystals arranged in a tower and operated at a temperature of ~10 mK. Events depositing energy in the detectors, such as radioactive decays or impinging particles, produced thermal pulses in the crystals which were read out using sensitive thermistors. The experiment included 4 enriched crystals, 2 enriched with 130Te and 2 with 128Te, in order to aid in the measurement of the 2v beta beta rate. The enriched crystals contained a total of ~350 g 130Te. The 128-enriched (130-depleted) crystals were used as background monitors, so that the shared backgrounds could be subtracted from the energy spectrum of the 130-enriched crystals. Residual backgrounds in the subtracted spectrum were fit using spectra generated by Monte-Carlo simulations of natural radioactive contaminants located in and on the crystals. The 2[nu] beta beta half-life was measured to be T1/2 = [9.81 plus/minus 0.96(stat) plus/minus 0.49(syst)] x 1020 y.
Download or read book Sensitivity of CUORE to Neutrinoless Double Beta Decay written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we study the sensitivity of CUORE, a bolometric double-beta decay experiment under construction at the Laboratori Nazionali del Gran Sasso in Italy. Two approaches to the computation of experimental sensitivity are discussed and compared, and the formulas and parameters used in the sensitivity estimates are provided. Assuming a background rate of 10−2 cts/(keV kg y), we find that, after 5 years of live time, CUORE will have a 1 [sigma] sensitivity to the neutrinoless double-beta decay half-life of {caret T{sup 0[nu]}{sub 1/2}}(1[sigma]) = 1.6x 1026 y and thus a potential to probe the effective Majorana neutrino mass down to 41-95 meV; the sensitivity at 1.64[sigma], which corresponds to 90% C.L., will be {caret T{sup 0[nu]}{sub 1/2}(1.64[sigma] }) = 9.5x1025 y. This range is compared with the claim of observation of neutrinoless double-beta decay in 76Ge and the preferred range in the neutrino mass parameter space from oscillation results.
Download or read book IGISOL written by Juha Äystö and published by Springer Science & Business Media. This book was released on 2014-01-23 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IGISOL group at the University of Jyväskyla studies the properties of nuclei far off the line of beta stability. These studies are performed locally at the Jyväskylä Ion Guide Isotope Separator On-Line (IGISOL) facility, as well as at a number of other laboratories such as the ISOLDE facility in CERN, at GANIL and in Helmholzzentrum GSI, the location of the future radioactive beam facility FAIR. The group is also actively involved in work to support the development of international future facilities EURISOL and aforementioned FAIR. This book presents carefully selected papers to portrait the work at IGISOL. Previously published in the journals Hyperfine Interactions and European Physical Journal A.
Download or read book Measurement of the two neutrino double beta decay half life of 150Nd with the NEMO 3 detector written by Kiyotaka Yamazaki and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis Techniques for the Evaluation of the Neutrinoless Double beta Decay Lifetime in 130Te with the CUORE 0 Detector written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, we describe in detail the methods used to obtain the lower bound on the lifetime of neutrinoless double-beta (0[nu][beta][beta]) decay in 130Te and the associated limit on the effective Majorana mass of the neutrino using the CUORE-0 detector. CUORE-0 is a bolometric detector array located at the Laboratori Nazionali del Gran Sasso that was designed to validate the background reduction techniques developed for CUORE, a next-generation experiment scheduled to come online in 2016. CUORE-0 is also a competitive 0[nu][beta][beta] decay search in its own right and functions as a platform to further develop the analysis tools and procedures to be used in CUORE. These include data collection, event selection and processing, as well as an evaluation of signal efficiency. In particular, we describe the amplitude evaluation, thermal gain stabilization, energy calibration methods, and the analysis event selection used to create our final 0[nu][beta][beta] search spectrum. We define our high level analysis procedures, with emphasis on the new insights gained and challenges encountered. We outline in detail our fitting methods near the hypothesized 0[nu][beta][beta] decay peak and catalog the main sources of systematic uncertainty. Finally, we derive the 0[nu][beta][beta] decay half-life limits previously reported for CUORE-0, T0[nu]1/2> 2.7×1024yr, and in combination with the Cuoricino limit, T0[nu]1/2> 4.0×1024yr.
Download or read book Neutrino nuclear responses for astro particle physics by nuclear reactions and nuclear decays written by Hiroyasu Ejiri and published by Frontiers Media SA. This book was released on 2023-07-05 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Double Beta Decay Half life of 150Nd and Search for Neutrinoless Decay Modes with the Nemo 3 Detector written by Nasim Fatemi-Ghomi and published by . This book was released on 2009 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Neutrino Physics and Astrophysics written by Carlo Giunti and published by Oxford University Press. This book was released on 2007-03-15 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our Universe is made of a dozen fundamental building blocks. Among these, neutrinos are the most mysterious - but they are the second most abundant particles in the Universe. This book provides detailed discussions of how to describe neutrinos, their basic properties, and the roles they play in nature.
Download or read book Measurement of the Double Decay Half life of 136Xe with the KamLAND Zen Experiment written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from the KamLAND-Zen double-beta decay experiment based on an exposure of 77.6 days with 129 kg of 136Xe. The measured two-neutrino double-beta decay half-life of 136Xe is T$2?top½$ = 2.38 ± 0.02(stat) ± 0.14(syst) x1021 yr, consistent with a recent measurement by EXO-200. We also obtain a lower limit for the neutrinoless double-beta decay half-life, T$0?top½$ > 5.7 x 1024 yr at 90% C.L.
Download or read book Searching for Neutrinoless Double Beta Decay of 130Te with CUORE written by and published by . This book was released on 2015 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
