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44 44

Phenomenological model for predicting the energy resolution of neutron-damaged coaxial HPGe detectors

Sep 24, 2013 09/13

by C. DeW. Van Siclen; E. H. Seabury; C. J. Wharton; A. J. Caffrey

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The peak energy resolution of germanium detectors deteriorates with increasing neutron fluence. This is due to hole capture at neutron-created defects in the crystal which prevents the full energy of the gamma-ray from being recorded by the detector. A phenomenological model of coaxial HPGe detectors is developed that relies on a single, dimensionless parameter that is related to the probability for immediate trapping of a mobile hole in the damaged crystal. As this trap parameter is...
Source: http://arxiv.org/abs/1112.2732v2

Arxiv.org

81 81

Possible background reductions in double beta decay experiments

Sep 19, 2013 09/13

by R. Arnold; C. Augier; J. Baker; A. Barabash; O. Bing; V. Brudanin; A. J. Caffrey; E. Caurier; K. Errahmane; A. -I. Etienvre; J. L. Guyonnet; F. Hubert; Ph. Hubert; C. Jollet; S. Jullian; O. Kochetov; V. Kovalenko; D. Lalanne; F. Leccia; C. Longuemare; Ch. Marquet; F. Mauger; H. W. Nicholson; H. Ohsumi; F. Piquemal; J-L. Reyss; X. Sarazin; Yu. Shitov; L. Simard; I. Stekl; J. Suhonen; C. S. Sutton; G. Szklarz; V. Timkin; V. Tretyak; V. Umatov; L. Vala; I. Vanyushin; V. Vasilyev; V. Vorobel; Ts....

eye 81

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The background induced by radioactive impurities of $^{208}\rm Tl$ and $^{214}\rm Bi$ in the source of the double beta experiment NEMO-3 has been investigated. New methods of data analysis which decrease the background from the above mentioned contamination are identified. The techniques can also be applied to other double beta decay experiments capable of measuring independently the energies of the two electrons.
Source: http://arxiv.org/abs/nucl-ex/0302022v1

Arxiv.org

63 63

Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

Jul 20, 2013 07/13

by R. Arnold; C. Augier; J. Baker; A. S. Barabash; M. Bongrand; G. Broudin; V. Brudanin; A. J. Caffrey; V. Egorov; A. I. Etienvre; N. Fatemi-Ghomi; F. Hubert; Ph. Hubert; J. Jerie; C. Jollet; S. Jullian; S. King; O. Kochetov; S. I. Konovalov; V. Kovalenko; D. Lalanne; T. Lamhamdi; F. Leccia; Y. Lemi`ere; C. Longuemare; G. Lutter; Ch. Marquet; F. Mauger; A. Nachab; H. Ohsumi; F. Perrot; F. Piquemal; J. L. Reyss; J. S. Ricol; R. Saakyan; X. Sarazin; L. Simard; F. Simkovic; Yu. Shitov; A. Smolnikov;...

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The double beta decay of 100Mo to the 0^+_1 and 2^+_1 excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited 0^+_1 state is measured to be T^(2nu)_1/2 = [5.7^{+1.3}_{-0.9}(stat)+/-0.8(syst)]x 10^20 y. The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta...
Source: http://arxiv.org/abs/hep-ex/0609058v1

Arxiv.org

57 57

Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

Sep 21, 2013 09/13

by R. Arnold; C. Augier; J. Baker; A. S. Barabash; A. Basharina-Freshville; S. Blondel; M. Bongrand; G. Broudin-Bay; V. Brudanin; A. J. Caffrey; A. Chapon; E. Chauveau; D. Durand; V. Egorov; R. Flack; X. Garrido; J. Grozier; B. Guillon; Ph. Hubert; C. M. Jackson; S. Jullian; M. Kauer; A. Klimenko; O. Kochetov; S. I. Konovalov; V. Kovalenko; D. Lalanne; T. Lamhamdi; K. Lang; Z. Liptak; G. Lutter; F. Mamedov; Ch. Marquet; J. Martin-Albo; F. Mauger; J. Mott; A. Nachab; I. Nemchenok; C. H. Nguyen; F....

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This Letter reports results from the NEMO-3 experiment based on an exposure of 1275 days with 661g of 130Te in the form of enriched and natural tellurium foils. The double beta decay rate of 130Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T1/2 = (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^{20} yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.
Source: http://arxiv.org/abs/1104.3716v3

Arxiv.org

61 61

Measurement of the background in the NEMO 3 double beta decay experiment

Sep 23, 2013 09/13

by NEMO Collaboration; J. Argyriades; R. Arnold; C. Augier; J. Baker; A. S. Barabash; M. Bongrand; G. Broudin-Bay; V. B. Brudanin; A. J. Caffrey; A. Chapon; E. Chauveau; Z. Daraktchieva; D. Durand; V. G. Egorov; N. Fatemi-Ghomi; R. Flack; A. Freshville; B. Guillon; Ph. Hubert; S. Jullian; M. Kauer; S. King; O. I. Kochetov; S. I. Konovalov; V. E. Kovalenko; D. Lalanne; K. Lang; Y. Lemi`ere; G. Lutter; F. Mamedov; Ch. Marquet; J. Martin-Albo; F. Mauger; A. Nachab; I. Nasteva; I. B. Nemchenok; F....

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In the double beta decay experiment NEMO~3 a precise knowledge of the background in the signal region is of outstanding importance. This article presents the methods used in NEMO~3 to evaluate the backgrounds resulting from most if not all possible origins. It also illustrates the power of the combined tracking-calorimetry technique used in the experiment.
Source: http://arxiv.org/abs/0903.2277v1

Arxiv.org

102 102

Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

Sep 22, 2013 09/13

by J. Argyriades; R. Arnold; C. Augier; J. Baker; A. S. Barabash; A. Basharina-Freshville; M. Bongrand; G. Broudin-Bay; V. Brudanin; A. J. Caffrey; A. Chapon; E. Chauveau; Z. Daraktchieva; D. Durand; V. Egorov; N. Fatemi-Ghomi; R. Flack; B. Guillon; Ph. Hubert; S. Jullian; M. Kauer; S. King; A. Klimenko; O. Kochetov; S. I. Konovalov; V. Kovalenko; D. Lalanne; T. Lamhamdi; K. Lang; Y. Lemiere; C. Longuemare; G. Lutter; F. Mamedov; Ch. Marquet; J. Martin-Albo; F. Mauger; A. Nachab; I. Nasteva; I....

eye 102

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Using 9.4 g of Zr-96 and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg yr, the obtained 2vbb decay half-life measurement is [2.35 +/- 0.14(stat) +/- 0.16(syst)] x 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 +/- 0.002. Constraints on 0vbb decay have also been set.
Source: http://arxiv.org/abs/0906.2694v5

Arxiv.org

94 94

Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

Jul 19, 2013 07/13

by R. Arnold; C. Augier; J. Baker; A. S. Barabash; A. Basharina-Freshville; M. Bongrand; V. Brudanin; A. J. Caffrey; S. Cebrián; A. Chapon; E. Chauveau; Th. Dafni; F. F. Deppisch; J. Diaz; D. Durand; V. Egorov; J. J. Evans; R. Flack; K-I. Fushima; I. García Irastorza; X. Garrido; H. Gómez; B. Guillon; A. Holin; K. Holy; J. J. Horkley; Ph. Hubert; C. Hugon; F. J. Iguaz; N. Ishihara; C. M. Jackson; S. Jullian; M. Kauer; O. Kochetov; S. I. Konovalov; V. Kovalenko; T. Lamhamdi; K. Lang; G. Lutter;...

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The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability to study different isotopes and track the outgoing electrons provides the means to discriminate different underlying mechanisms for the neutrinoless double beta decay by measuring the decay half-life and the electron angular and energy distributions.
Source: http://arxiv.org/abs/1005.1241v2

Arxiv.org

12 12

$Result of the search for neutrinoless double-$\beta$ decay in $^{100}$Mo with the NEMO-3 experiment$

Result of the search for neutrinoless double-$\beta$ decay in $^{100}$Mo with the NEMO-3 experiment

Jun 28, 2018 06/18

by R. Arnold; C. Augier; J. D. Baker; A. S. Barabash; A. Basharina-Freshville; S. Blondel; S. Blot; M. Bongrand; V. Brudanin; J. Busto; A. J. Caffrey; S. Calvez; C. Cerna; J. P. Cesar; A. Chapon; E. Chauveau; D. Duchesneau; D. Durand; V. Egorov; G. Eurin; J. J. Evans; L. Fajt; D. Filosofov; R. Flack; X. Garrido; H. Gómez; B. Guillon; P. Guzowski; R. Hodák; A. Huber; P. Hubert; C. Hugon; S. Jullian; A. Klimenko; O. Kochetov; S. I. Konovalov; V. Kovalenko; D. Lalanne; K. Lang; Y. Lemière; T. Le...

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The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double $\beta$ ($0\nu\beta\beta$) decay. We report final results of a search for $0\nu\beta\beta$ decays with $6.914$ kg of $^{100}$Mo using the entire NEMO-3 data set with a detector live time of $4.96$ yr, which corresponds to an exposure of 34.3 kg$\cdot$yr. We perform a detailed study of the expected background in the $0\nu\beta\beta$ signal region...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1506.05825

Arxiv.org

10 10.0

$Measurement of the $2\nu\beta\beta$ Decay Half-Life and Search for the $0\nu\beta\beta$ Decay of $^{116}$Cd with the NEMO-3 Detector$

Measurement of the $2\nu\beta\beta$ Decay Half-Life and Search for the $0\nu\beta\beta$ Decay of $^{116}$Cd with the NEMO-3 Detector

Jun 29, 2018 06/18

by NEMO-3 Collaboration; :; R. Arnold; C. Augier; J. D. Baker; A. S. Barabash; A. Basharina-Freshville; S. Blondel; S. Blot; M. Bongrand; D. Boursette; V. Brudanin; J. Busto; A. J. Caffrey; S. Calvez; M. Cascella; C. Cerna; J. P. Cesar; A. Chapon; E. Chauveau; A. Chopra; D. Duchesneau; D. Durand; V. Egorov; G. Eurin; J. J. Evans; L. Fajt; D. Filosofov; R. Flack; X. Garrido; H. Gómez; B. Guillon; P. Guzowski; R. Hodák; A. Huber; P. Hubert; C. Hugon; S. Jullian; A. Klimenko; O. Kochetov; S. I....

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The NEMO-3 experiment measured the half-life of the $2\nu\beta\beta$ decay and searched for the $0\nu\beta\beta$ decay of $^{116}$Cd. Using $410$ g of $^{116}$Cd installed in the detector with an exposure of $5.26$ y, ($4968\pm74$) events corresponding to the $2\nu\beta\beta$ decay of $^{116}$Cd to the ground state of $^{116}$Sn have been observed with a signal to background ratio of about $12$. The half-life of the $2\nu\beta\beta$ decay has been measured to be $...
Topics: Instrumentation and Detectors, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1610.03226

Arxiv.org

4 4.0

$Measurement of the 2$\nu\beta\beta$ decay half-life of $^{150}$Nd and a search for 0$\nu\beta\beta$ decay processes with the full exposure from the NEMO-3 detector$

Measurement of the 2$\nu\beta\beta$ decay half-life of $^{150}$Nd and a search for 0$\nu\beta\beta$ decay processes with the full exposure from the NEMO-3 detector

Jun 29, 2018 06/18

by NEMO-3 Collaboration; :; R. Arnold; C. Augier; J. D. Baker; A. S. Barabash; A. Basharina-Freshville; S. Blondel; S. Blot; M. Bongrand; V. Brudanin; J. Busto; A. J. Caffrey; S. Calvez; M. Cascell; C. Cerna; J. P. Cesar; A. Chapon; E. Chauveau; A. Chopra; D. Duchesneau; D. Durand; V. Egorov; G. Eurin; J. J. Evans; L. Fajt; D. Filosofov; R. Flack; X. Garrido; H. Gòmez; B. Guillon; P. Guzowski; R. Hodák; A. Huber; P. Hubert; C. Hugon; S. Jullian; A. Klimenko; O. Kochetov; S. I. Konovalov; V....

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We present results from a search for neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay using 36.6 g of the isotope $^{150}$Nd with data corresponding to a live time of 5.25 y recorded with the NEMO-3 detector. We construct a complete background model for this isotope, including a measurement of the two-neutrino double-$\beta$ decay half-life of $T^{2\nu}_{1/2}=$[9.34 $\pm$ 0.22 (stat.) $^{+0.62}_{-0.60}$ (syst.)]$\times 10^{18}$ y for the ground state transition, which represents the most...
Topics: Instrumentation and Detectors, Nuclear Experiment, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1606.08494

Arxiv.org

10 10.0

$Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of $^{48}{\rm Ca}$ with the NEMO-3 detector$

Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of $^{48}{\rm Ca}$ with the NEMO-3 detector

Jun 29, 2018 06/18

by NEMO-3 Collaboration; :; R. Arnold; C. Augier; A. M. Bakalyarov; J. D. Baker; A. S. Barabash; A. Basharina-Freshville; S. Blondel; S. Blot; M. Bongrand; V. Brudanin; J. Busto; A. J. Caffrey; S. Calvez; M. Cascella; C. Cerna; J. P. Cesar; A. Chapon; E. Chauveau; A. Chopra; D. Duchesneau; D. Durand; V. Egorov; G. Eurin; J. J. Evans; L. Fajt; D. Filosofov; R. Flack; X. Garrido; H. Gómez; B. Guillon; P. Guzowski; R. Hodák; A. Huber; P. Hubert; C. Hugon; S. Jullian; A. Klimenko; O. Kochetov; S. I....

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The NEMO-3 experiment at the Modane Underground Laboratory has investigated the double-$\beta$ decay of $^{48}{\rm Ca}$. Using $5.25$ yr of data recorded with a $6.99\,{\rm g}$ sample of $^{48}{\rm Ca}$, approximately $150$ double-$\beta$ decay candidate events have been selected with a signal-to-background ratio greater than $3$. The half-life for the two-neutrino double-$\beta$ decay of $^{48}{\rm Ca}$ has been measured to be $T^{2\nu}_{1/2}\,=\,[6.4\, ^{+0.7}_{-0.6}{\rm (stat.)} \,...
Topics: Instrumentation and Detectors, Nuclear Experiment, Physics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1604.01710

Arxiv.org

46 46

Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors

Sep 22, 2013 09/13

by J. Argyriades; R. Arnold; C. Augier; J. Baker; A. S. Barabash; M. Bongrand; G. Broudin-Bay; V. B. Brudanin; A. J. Caffrey; S. Cebrián; A. Chapon; E. Chauveau; Th. Dafni; Z. Daraktchieva; J. D iaz; D. Durand; V. G. Egorov; J. J. Evans; N. Fatemi-Ghomi; R. Flack; A. Basharina-Freshville; K-I. Fushimi; X. Garrido; H. Gómez; B. Guillon; A. Holin; K. Holy; J. J. Horkey; Ph. Hubert; C. Hugon; F. J. Iguaz; I. G. Irastorza; N. Ishihara; C. M. Jackson; S. Jullian; S. Kanamaru; M. Kauer; O. I....

eye 46

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We have constructed a GEANT4-based detailed software model of photon transport in plastic scintillator blocks and have used it to study the NEMO-3 and SuperNEMO calorimeters employed in experiments designed to search for neutrinoless double beta decay. We compare our simulations to measurements using conversion electrons from a calibration source of $\rm ^{207}Bi$ and show that the agreement is improved if wavelength-dependent properties of the calorimeter are taken into account. In this...
Source: http://arxiv.org/abs/1004.3779v2

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