The proposed Majorana 76Ge double-beta decay experiment

Aalseth, Craig E.; Anderson, Dale N.; Arthur, R.J.; Avignone, F. T.; Baktash, C.; Ball, T.; Barabash, A. S.; Bertrand, F.; Brodzinski, R. L.; Brudanin, V.; Bugg, W.; Champagne, Arthur E; Chan, Y-D.; Cianciolo, T. V.; Collar, J. I.; Creswick, R.; Descovich, M.; Marco, M. Di; Doe, P. J.; Dunham, Glen; Efremenko, Yu.; Egerov, V.; Ejiri, H.; Elliott, S. R.; Emanuel, A.E.; Fallon, P.; Farach, H.A.; Gaitskell, R. J.; Gehman, V. M.; Grzywacz, R.; Hallin, A. L.; Hazma, R.; Henning, R.; Hime, A.; Hossbach, Todd W.; Jordan, David V.; Kazkaz, K.; Kephart, Jeremy D.; King, G. S.; Kochetov, O.; Коновалов, С. И.; Kouzes, R.T.; Lesko, K. T.; Luke, P.N.; Luzum, Matthew; Macchiavelli, A. O.; McDonald, A. B.; Mei, D. M.; Miley, Harry S.; Mills, G. B.; Mokhtarani, A.; Nomachi, M.; Orrell, J. L.; Palms, J.M.; Poon, A. W. P.; Radford, D. C.; Reeves, J.H.; Robertson, R. G. H.; Runkle, Robert C.; Rykaczewski, K.; Saburov, K.; Sandukovsky, Y.; Sonnenschein, A.; Tornow, W.; Tull, C. E.; Water, R. G. Van de; Vanushin, I.; Vetter, K.; Warner, R.A.; Wilkerson, J. F.; Wouters, Jan; Young, A. R.; Yumatov, V.

doi:10.1016/j.nuclphysbps.2004.11.052

Cited by 51 publications

(18 citation statements)

References 3 publications

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“…On the other hand, very restrictive bounds on m ll ′ can be obtained by combining neutrino oscillation data [17] , cosmological bounds [18][19][20][21] and tritium beta decay [22]. Interestingly, these sub-eV bounds on the scale of effective Majorana masses are at the sensitivity reaches of current experimental projects [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Lepton number violation in top quark and neutralBmeson decays

Delépine¹,

Castro²,

Quintero³

2011

Phys. Rev. D

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Lepton number violation (LNV) can be induced by Majorana neutrinos in four-body decays of the neutral B meson and the top quark. We study the effects of Majorana neutrinos in these |∆L| = 2 decays in an scenario where a single heavy neutrino can enhance the amplitude via the resonant mechanism. Using current bounds on heavy neutrino mixings, the most optimistic branching ratios turn out to be at the level of 10 −6 forB 0 → D + e − e − π + and t → bl + l + W − decays. Searches for these LNV decays at future facilities can provide complementary constraints on masses and mixings of Majorana neutrinos.

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Section: Introductionmentioning

confidence: 99%

Lepton number violation in top quark and neutralBmeson decays

Delépine¹,

Castro²,

Quintero³

2011

Phys. Rev. D

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“…Although experimenters operate their detectors deep underground and go to great lengths to optimize radiation shielding, the experiments have become so sensitive that even these efforts may not be sufficient. The characterization of the fast neutron fluence has become a critical issue for experiments that require these ex-Email address: brian.fisher@jhuapl.edu (B. M. Fisher) 1 Present address: Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA treme low-background environments, such as neutrinoless double-beta decay [3,4,5], dark matter searches [6,7,8,9], and solar neutrino experiments [10,11,12,13,14,15]. In some experiments, fast neutrons may be the dominant and potentially irreducible background, thus necessitating precise information about the fast neutron fluence and energy spectrum.…”

Section: Overviewmentioning

confidence: 99%

Fast neutron detection with 6Li-loaded liquid scintillator

Fisher

Abdurashitov

Coakley

et al. 2011

Nuclear Instruments and Methods in Physics Research Section A:

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We report on the development of a fast neutron detector using a liquid scintillator doped with enriched 6 Li. The lithium was introduced in the form of an aqueous LiCl micro-emulsion with a di-isopropylnaphthalene-based liquid scintillator. A 6 Li concentration of 0.15 % by weight was obtained. A 125 mL glass cell was filled with the scintillator and irradiated with fission-source neutrons. Fast neutrons may produce recoil protons in the scintillator, and those neutrons that thermalize within the detector volume can be captured on the 6 Li. The energy of the neutron may be determined by the light output from recoiling protons, and the capture of the delayed thermal neutron reduces background events. In this paper, we discuss the development of this 6 Li-loaded liquid scintillator, demonstrate the operation of it in a detector, and compare its efficiency and capture lifetime with Monte Carlo simulations. Data from a boron-loaded plastic scintillator were acquired for comparison. We also present a pulse-shape discrimination method for differentiating between electronic and nuclear recoil events based on the Matusita distance between a normalized observed waveform and nuclear and electronic recoil template waveforms. The details of the measurements are discussed along with specifics of the data analysis and its comparison with the Monte Carlo simulation.

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“…Highly efficient and compact veto systems to tag cosmic muons become increasingly important components for low background experiments, such as searching for Dark Matter and Double Beta decay [1], [2], [3], [4]. Requirements for such a system are compactness, hermiticity, very high efficiency for muon identification and immunity from ambient gamma ray background.…”

Section: Introductionmentioning

confidence: 99%

Large plastic scintillator panels with WLS fiber readout: Optimization of components

Bugg

Efremenko

Vasilyev

2014

Nuclear Instruments and Methods in Physics Research Section A:

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Results are presented on R&D efforts to design and build large size veto panels, optimized for underground low background experiments, in the most efficient and economical way using commercially available components. A variety of plastic scintillators, photomultiplier tubes, wavelength shifting fibers, and light reflector combinations were tested. Results of these studies and performance of a 2.2 meter long panel are presented.

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The proposed Majorana 76Ge double-beta decay experiment

Cited by 51 publications

References 3 publications

Lepton number violation in top quark and neutralBmeson decays

Lepton number violation in top quark and neutralBmeson decays

Fast neutron detection with 6Li-loaded liquid scintillator

Large plastic scintillator panels with WLS fiber readout: Optimization of components

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