Download or read book Search for Neutrinoless Double Beta Decay of 116Cd and 82Se and Calorimeter Simulations for the SuperNEMO Experiment written by Zachary John Liptak and published by . This book was released on 2014 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the NEMO-3 detector, 410.4 g of 116Cd with a total exposure of 1.65 kg· y and 932 g of 82Se with a total exposure of 3.75 kg· y were used to measure the half-life of two-neutrino double beta decay (2[nu][beta][beta]) to the ground states of 116Sn and 82Kr and to place a lower limit on the neutrinoless double becay decay (0[nu][beta][beta]) to the same ground states. Under the single-states dominance hypothesis, the 2[nu][beta][beta] half-lives are found to be T 1/2(116Cd) = (2.90 ± 0.03(stat) ± 0.15(syst)×1019 yr and T 1/2(82Se) = [10.62±0.11(stat)±0.56(syst)]×1019 yr. 0[nu][beta][beta] is excluded to 90% confidence level at T 1/2 ≥ 1.12 × 1023 yr for 116Cd and T 1/2 ≥ 3.90 × 1023 yr for 82Se. These half-lives correspond to effective Majorana neutrino masses of m ≤ (4.33 - 5.54) eV and m ≤ (2.28 - 2.82) eV, respectively, in the light Majorana exchange mechanism.

Download or read book Search for the Neutrinoless Double Beta Decay of 100Mo with the NEMO3 Detector and Calorimeter Research and Development for the SuperNEMO Experiment written by Anastasia Basharina-Freshville and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for the Neutrinoless Double Beta Decay of 100Mo with the NEMO3 Detector and Calorimeter Research and Development for the SuperNEMO Experiment written by A. Basharina-Freshville and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The world's most precise half-life measurement of T 2nu_1/2 = [7.02 ± 0.01(stat) ± 0.46(syst)] × 10 18 years has been made for the 2\nu\beta\beta decay of 100Mo using data from 6.9kg collected with the NEMO3 detector over 1471 days. The 2\nu nuclear matrix element has been extracted using T 2nu_1/2 and is M 2\nu = 0.126 ± 0.004. The 0\nu\beta\beta search yielded a limit on the half-life of T 0\nu_1/2 1/1 > 1.1 × 10 24 years at the 90% CL, corresponding to a limit on the effective Majorona mass of \langle M\nu e\rangle

Download or read book Search for the Double Beta Decay of Zr 96 with NEMO 3 and Calorimeter Development for the SuperNEMO Experiment written by M. B. Kauer and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 9.4 g of Zr-96 and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kgy, the obtained 2vbb decay half-life measurement is [2.35 \pm 0.14(stat) \pm 0.16(syst)] \times 10_{19}yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2v nuclear matrix element is extracted using the measured 2vbb half-life and is 0.049 \pm 0.002. The 0vbb decay half-life is excluded at the 90% CL to > 9.2 \times 10_ {21}yr corresponding to a limit on the effective Majorana neutrino mass of

Download or read book Search for the Double Beta Decay of Zr 96 with NEMO 3 and Calorimeter Development for the SuperNEMO Experiment written by Matthew B. Kauer and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for Neutrinoless Double Beta Decay of Cd 116 with the NEMO 3 Experiment written by Raymond Benton Pahlka and published by . This book was released on 2010 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the approach taken in measuring two neutrino double beta decay of Cd-116 to the ground state of Sn-116 and in searching for the effective Majorana neutrino mass by placing a lower limit on the half-life for neutrinoless double beta decay of Cd-116 using the powerful technique of a combined tracking chamber and calorimeter with the NEMO-3 detector. The description of the detector, its natural background contamination, and the tools used to perform the analysis are discussed. The single electron channel was used to identify source foil contamination from [beta]-emitters and the electron-gamma channel was used to confirm the previous measurements of Tl-208 and Bi-214 contaminations in the source foil. Using these backgrounds, the two neutrino double beta decay half-life of Cd-116 was measured for the single states dominance hypothesis and the higher states dominance hypothesis. The final data set was defined to be data from Phrase One and Phase Two for the medium and low activity regions. Using 1471 days of data, the values of the half-life for the single data dominance hypothesis and the higher states dominance hypothesis were found.

Download or read book Calibration and Monitoring Systems for Neutrinoless Double Beta Decay Searches in the SuperNEMO Experiment written by Ramon Maurilio Salazar and published by . This book was released on 2021 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for Double Beta Decay of 82Se with the NEMO 3 Detector and Development of Apparatus for Low level Radon Measurements for the SuperNEMO Experiment written by J. E. Mott and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for Double Beta Decay of 82Se with the MENO 3 Detector and Development of Apparatus for Low level Radon Measurements for the SuperNEMO Experiment written by and published by . This book was released on 2014 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutrinoless Double Beta Decay written by V. K. B. Kota and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many new neutrinoless double beta decay experiments are planned all over the world. This book reviews this and other related experiments, and the theoretical aspects of the neutrinoless double beta decay and its consequences are summarized.

Download or read book Simulation and Sensitivity Studies for the Double Beta Decay Experiment SuperNEMO written by Darren David Price and published by . This book was released on 2005 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Results on Neutrinoless Double Beta Decay of Te 130 with the Calorimetric Cuoricino Experiment written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first results are reported on the limit for neutrinoless double decay of 13°Te 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 x 3 x 6 cm3. Four of these latter crystals are made with isotopically enriched materials: two in 128Te and two others in 13°Te . With a sensitive mass of (almost equal to)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 (almost equal to)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 (almost equal to)0.2 counts keV−1 kg−1 year−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 x 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.

Download or read book Search for the Double beta Decay of 96Zr with the NEMO 3 Detector and Ultra low Radioactivity Measurements for the SuperNEMO Experiment Using the BiPo 3 Detector written by Guillaume Eurin and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book What Can We Learn from Neutrinoless Double Beta Decay Experiments written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We assess how well next generation neutrinoless double beta decay and normal neutrino beta decay experiments can answer four fundamental questions. 1) If neutrinoless double beta decay searches do not detect a signal, and if the spectrum is known to be inverted hierarchy, can we conclude that neutrinos are Dirac particles? 2) If neutrinoless double beta decay searches are negative and a next generation ordinary beta decay experiment detects the neutrino mass scale, can we conclude that neutrinos are Dirac particles? 3) If neutrinoless double beta decay is observed with a large neutrino mass element, what is the total mass in neutrinos? 4) If neutrinoless double beta decay is observed but next generation beta decay searches for a neutrino mass only set a mass upper limit, can we establish whether the mass hierarchy is normal or inverted? We base our answers on the expected performance of next generation neutrinoless double beta decay experiments and on simulations of the accuracy of calculations of nuclear matrix elements.

Download or read book The Next Experiment for Neutrinoless Double Beta Decay Searches written by Universitat de València. Facultat de Física and published by . This book was released on 2015 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutrinoless Double beta Decay Search with CUORE and CUORE 0 Experiments written by and published by . This book was released on 2015 with total page 3004 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cryogenic Underground Observatory for Rare Events (CUORE) is an upcoming experiment designed to search for the neutrinoless double-beta decays. Observation of the process would unambiguously establish that neutrinos are Majorana particles and provide information on their absolute mass scale hierarchy. CUORE is now under construction and will consist of an array of 988 TeO2 crystal bolometers operated at 10 mK, but the first tower (CUORE-0) is already taking data. The experimental techniques used will be presented as well as the preliminary CUORE-0 results. The current status of the full-mass experiment and its expected sensitivity will then be discussed.

Download or read book Search for the Double beta Decay of 96Zr with the NEMO 3 Detector and Ultra low Radioactivity Measurements for the SuperNEMO Experiment Using the BiPo 3 Detector written by G. Eurin and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: