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156. Status of the MAJORANA Demonstrator

Author

Cuesta, C., Abgrall, N., Arnquist, I. J., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Brudanin, V., Busch, M., Buuck, M., Byram, D., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Detwiler, J. A., Efremenko, Yu., Ejiri, H., Elliott, S. R., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Greenn, M. P., Gruszko, J., Guinn, I. S., Guiseppe, V. E., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Jasinski, B. R., Keeter, K. J., Kidd, M. F., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., MacMullin, J., Martin, R. D., Meijer, S. J., Mertens, S., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Poon, A. W. P., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Schmitt, C., Shanks, B., Shirchenko, M., Snyder, N., Suriano, A. M., Tedeschi, D., Timkin, V., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Yu, C. -H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The MAJORANA Collaboration is constructing the MAJORANA Demonstrator, an ultra-low background, 40-kg modular high purity Ge detector array to search for neutrinoless double-beta decay in Ge. In view of the next generation of tonne-scale Ge-based neutrinoless double-beta decay searches that will probe the neutrino mass scale in the inverted-hierarchy region, a major goal of the Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 count/tonne/year in the 4 keV region of interest around the Q-value at 2039 keV. The current status of the Demonstrator is discussed, as are plans for its completion., Comment: 7 pages, 4 figures, contribution to the NOW 2014 Proceedings, to be published by Nucl. Phys. B (Proc. Suppl.)

Published
2014

157. A Dark Matter Search with MALBEK

Author

Giovanetti, G. K., Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Byram, D., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Cuesta, C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, J., MacMullin, S., Martin, R. D., Meijer, S., Mertens, S., Nomachi, M., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Suriano, A. M., Thompson, J., Timkin, V., Tornow, W., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Young, A. R., Yu, C. -H., and Yumatov, V.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The MAJORANA DEMONSTRATOR is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of 76-Ge and perform a search for weakly interacting massive particles (WIMPs) with masses below 10 GeV. As part of the MAJORANA research and development efforts, we have deployed a modified, low-background broad energy germanium detector at the Kimballton Underground Research Facility. With its sub-keV energy threshold, this detector is sensitive to potential non-Standard Model physics, including interactions with WIMPs. We discuss the backgrounds present in the WIMP region of interest and explore the impact of slow surface event contamination when searching for a WIMP signal., Comment: To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)

Published
2014

158. Background Model for the Majorana Demonstrator

Author

Cuesta, C., Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Byram, D., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, J., MacMullin, S., Martin, R. D., Meijer, S., Mertens, S., Nomachi, M., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Suriano, A. M., Thompson, J., Timkin, V., Tornow, W., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Xu, W., Yakushev, E., Young, A. R., Yu, C. H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Majorana Collaboration is constructing a system containing 40 kg of HPGe detectors to demonstrate the feasibility and potential of a future tonne-scale experiment capable of probing the neutrino mass scale in the inverted-hierarchy region. To realize this, a major goal of the Majorana Demonstrator is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest around the Q-value at 2039 keV. This goal is pursued through a combination of a significant reduction of radioactive impurities in construction materials with analytical methods for background rejection, for example using powerful pulse shape analysis techniques profiting from the p-type point contact HPGe detectors technology. The effectiveness of these methods is assessed using simulations of the different background components whose purity levels are constrained from radioassay measurements., Comment: To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)

Published
2014

159. Testing the Ge detectors for the MAJORANA DEMONSTRATOR

Author

Xu, W., Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Byram, D., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Cuesta, C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, J., MacMullin, S., Martin, R. D., Meijer, S., Mertens, S., Nomachi, M., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rager, J., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Suriano, A. M., Thompson, J., Timkin, V., Tornow, W., Trimble, J. E., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Wiseman, C., Yakushev, E., Young, A. R., Yu, C. H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

High purity germanium (HPGe) crystals will be used for the MAJORANA DEMONSTRATOR, where they serve as both the source and the detector for neutrinoless double beta decay. It is crucial for the experiment to understand the performance of the HPGe crystals. A variety of crystal properties are being investigated, including basic properties such as energy resolution, efficiency, uniformity, capacitance, leakage current and crystal axis orientation, as well as more sophisticated properties, e.g. pulse shapes and dead layer and transition layer distributions. In this paper, we will present our measurements that characterize the HPGe crystals. We will also discuss our simulation package for the detector characterization setup, and show that additional information can be extracted from data-simulation comparisons., Comment: To appear in the Proceedings of the 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013 (F. Avignone & W. Haxton, editors, Physics Procedia, Elsevier)

Published
2014

160. A search for bremsstrahlung solar axions using the Majorana low-background BEGe detector at Kimballton (MALBEK)

Author

Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Cooper, R. J., Creswick, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Elliott, S. R., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, J., MacMullin, S., Marino, M. G., Martin, R. D., Mertens, S., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shanks, B., Shirchenko, M., Snavely, K. J., Snyder, N., Steele, D., Suriano, A. M., Thompson, J., Timkin, V., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Xu, W., Yakushev, E., Young, A. R., Yu, C. H., and Yumatov, V.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Abstract

A low-background, high-purity germanium detector has been used to search for evidence of low-energy, bremsstrahlung-generated solar axions. An upper bound of $1.36\times 10^{-11}$ $(95% CL)$ is placed on the direct coupling of DFSZ model axions to electrons. The prospects for the sensitivity of the Majorana Demonstrator array of point-contact germanium detectors to solar axions are discussed in the context of the model-independent annual modulation due to the seasonal variation of the earth-sun distance., Comment: This paper has been withdrawn by the authors. Recent results we were not aware of should be taken into account

Published
2014

161. Effect of heat treatment on some mechanical properties of AA2024 aluminum alloy.

Author

Mahan, Hamid M., Konovalov, S. V., and Shabeeb, Omran A.

Subjects
*METAL fatigue, *FATIGUE limit, *MECHANICAL heat treatment, *ALUMINUM alloys, *ALUMINUM alloying
Abstract

In this paper, the effect of heat treatment on the AA2024 aluminum metal matrix on fatigue properties was studied, microstructural, hardness, and x-ray. A stir casting technique was used to fabricate the aluminums alloy AA2024. These round cylindrical rods of material were formed into cast iron mold where some samples were cooled quickly to room temperature while others were aged. The heat treatment has been performed for 3 hours at a temperature of 500°C followed by quenching in water. It was then artificially aged at 170°C for 3 hours and quenched in air. The findings of this research reveal that the fatigue strength and Vickers hardness of the aluminum alloy AA2024 were improved after heat treatment. The improvement was 30% and 50% for fatigue stress and hardness, respectively. According to the results, the gradual chilling process leads to the creation of microscopic MgZn2 segregations, whereas the rapid cooling process does not produce these types of segregations. In addition to this, it was discovered that the heat treatment operations of age hardening were able to eradicate these micro segregations and improve the mechanical properties of the AA 2024 Al alloy. [ABSTRACT FROM AUTHOR]

Published
2024
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164. Linear Friction Welding of Similar and Dissimilar Materials: A Review

Author

Gangil, N, Mishra, A, Lone, NF, Bajaj, D, Chen, D, Haider, J, Chen, X, Konovalov, S, Siddiquee, AN, Gangil, N, Mishra, A, Lone, NF, Bajaj, D, Chen, D, Haider, J, Chen, X, Konovalov, S, and Siddiquee, AN

Abstract

Linear friction welding (LFW) has distinction of being a unique process which can join components in a variety of materials, shape and size configurations in an extremely low cycle time. The conventional arc welding, friction stir welding and rotary friction welding are also very popular and a lot of work has been reported on materials joined by these processes. The ability to join huge and small size parts, in a variety of similar and dissimilar materials, shapes and sizes make LFW un-paralleled. Such joint configurations are very common in transportation sectors including aerospace and railways. Very little work is reported on the LFW process in comparison to aforementioned popular welding processes. An attempt is made in this article to present the state of the art on LFW of various materials in similar and dissimilar combinations. Materials in promising applications such as space, aircraft, aerospace and railways are the main focusses. This work is expected to act as a single window to showcase all aspects of LFW on ferrous and non-ferrous materials in similar and dissimilar combinations. The manuscript begins with an overview on the principle of operation and classification, and subsequently extends the topic to detailed discussion on the joint characteristics, microstructure, material combination and application domain. The literature on LFW was studied and classified based on similar and dissimilar materials, effects of parameters on properties and microstructure responses, evolution of heat and stress conditions, and applications. The article presents, at the end, a meticulously carved out concluding summary which is expected to provide future directions and also an easy to figure out coverage on the discussion.

Published
2024

171. Search for 2{\beta} decay of 116Cd with the help of enriched 116CdWO4 crystal scintillators

Author

Poda, D. V., Barabash, A. S., Belli, P., Bernabei, R., Cappella, F., Caracciolo, V., Castellano, S., Chernyak, D. M., Cerulli, R., Danevich, F. A., d'Angelo, S., Incicchitti, A., Kobychev, V. V., Konovalov, S. I., Laubenstein, M., Podviyanuk, R. B., Polischuk, O. G., Shlegel, V. N., Tretyak, V. I., Umatov, V. I., and Vasiliev, Ya. V.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

Cadmium tungstate crystal scintillators enriched in $^{116}$Cd to 82% ($^{116}$CdWO$_4$, total mass of $\approx$1.2 kg) are used to search for 2$\beta$ decay of $^{116}$Cd deep underground at the Gran Sasso National Laboratory of the INFN (Italy). The radioactive contamination of the $^{116}$CdWO$_4$ crystals has been studied carefully to reconstruct the background of the detector. The measured half-life of $^{116}$Cd relatively to 2$\nu$2$\beta$ decay is $T^{2\nu2\beta}_{1/2}$ = [2.8 $\pm$ 0.05(stat.) $\pm$ 0.4(syst.)] $\times$ 10$^{19}$ yr, in agreement with the results of previous experiments. The obtained limit on the 0$\nu$2$\beta$ decay of $^{116}$Cd (considering the data of the last 8696 h run with an advanced background 0.12(2) counts/yr/kg/keV in the energy interval 2.7-2.9 MeV) is $T_{1/2} \ge 1.0 \times 10^{23}$ yr at 90% C.L. The sensitivity of the experiment to the $0\nu2\beta$ process is $\lim T_{1/2} = 3 \times 10^{23}$ yr at 90% C.L. over 5 years of the measurements and it can be advanced (by further reduction of the background by a factor 3-30) to the level of $\lim T_{1/2} = (0.5-1.5) \times 10^{24}$ yr for the same period of the data taking., Comment: Contribution to Proc. of Int. Workshop on Radiopure Scintillators RPSCINT 2013, 17-20.09.2013, Kyiv, Ukraine; to be published in EPJ Web of Conferences; 4 pages, 1 figure and 3 tables

Published
2013
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172. Search for Neutrinoless Double-Beta Decay of $^{100}$Mo with the NEMO-3 Detector

Author

Collaboration, NEMO-3, Arnold, R., Augier, C., Baker, J. D., Barabash, A. S., Basharina-Freshville, A., Blondel, S., Blot, S., Bongrand, M., Brudanin, V., Busto, J., Caffrey, A. J., Cerna, C., Chapon, A., Chauveau, E., Duchesneau, D., Durand, D., Egorov, V., Eurin, G., Evans, J. J., Flack, R., Garrido, X., Gómez, H., Guillon, B., Guzowski, P., Hodák, R., Hubert, P., Hugon, C., Jullian, S., Klimenko, A., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lang, K., Lemière, Y., Liptak, Z., Loaiza, P., Lutter, G., Mamedov, F., Marquet, C., Mauger, F., Morgan, B., Mott, J., Nemchenok, I., Nomachi, M., Nova, F., Nowacki, F., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Povinec, P., Ramachers, Y. A., Remoto, A., Reyss, J. L., Richards, B., Riddle, C. L., Rukhadze, E., Saakyan, R., Sarazin, X., Shitov, Yu., Simard, L., Šimkovic, F., Smetana, A., Smolek, K., Smolnikov, A., Söldner-Rembold, S., Soulé, B., Štekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Torre, S., Tretyak, Vl. I., Tretyak, V. I., Umatov, V. I., Vanushin, I., Vilela, C., Vorobel, V., Waters, D., and Žukauskas, A.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We report the results of a search for the neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) of $^{100}$Mo, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7 kg.y, no evidence for the 0$\nu\beta\beta$ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of $T_{1/2}(0\nu\beta\beta)>1.1 \times 10^{24}$ years (90% C.L.) once both statistical and systematic uncertainties are taken into account. Depending on the Nuclear Matrix Elements this corresponds to an upper limit on the Majorana effective neutrino mass of $< m_{\nu} > < 0.3-0.9$ eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0$\nu\beta\beta$ decays are also given. Searching for high-energy double electron events in all suitable sources of the detector, no event in the energy region [3.2-10] MeV is observed for an exposure of 47 kg.y.

Published
2013
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173. Status of the MAJORANA DEMONSTRATOR experiment

Author

MAJORANA Collaboration, Martin, R. D., Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, J., MacMullin, S., Mertens, S., Mizouni, L., Nomachi, M., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rielage, K., Robertson, R. G. H., Romero-Romero, E., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Soin, A., Suriano, A. M., Thompson, J., Timkin, V., Tornow, W., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Xu, W., Yakushev, E., Young, A. R., Yu, C. -H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The MAJORANA DEMONSTRATOR neutrinoless double beta-decay experiment is currently under construction at the Sanford Underground Research Facility in South Dakota, USA. An overview and status of the experiment are given., Comment: 8 pages, proceeding from VII International Conference on Interconnections between Particle Physics and Cosmology (PPC 2013), submitted to AIP proceedings

Published
2013

174. The {\sc Majorana Demonstrator} Neutrinoless Double-Beta Decay Experiment

Author

Majorana Collaboration, Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, S., Martin, R. D., Mertens, S., Mizouni, L., Nomachi, M., Orrell, J. L., O'Shaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Steele, D., Strain, J., Suriano, A. M., Thompson, J., Timkin, V., Tornow, W., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Xu, W., Yakushev, E., Young, A. R., Yu, C-H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The {\sc Majorana Demonstrator will search for the neutrinoless double-beta decay of the isotope Ge-76 with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own antiparticle, demonstrate that lepton number is not conserved, and provide information on the absolute mass scale of the neutrino. The {\sc Demonstrator} is being assembled at the 4850-foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be situated in a low-background environment and surrounded by passive and active shielding. Here we describe the science goals of the {\sc Demonstrator} and the details of its design., Comment: accepted for publication in Advances in High Energy Physics

Published
2013

175. The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76

Author

MAJORANA Collaboration, Elliott, S. R., Abgrall, N., Aguayo, E., Avignone III, F. T., Barabash, A. S., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Caldwell, A. S., Chan, Y-D., Christofferson, C. D., Combs, D. C., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Esterline, J., Fast, J. E., Finnerty, P., Fraenkleo, F. M., Galindo-Uribarri, A., Giovanetti, G. K., Goett, J., Green, M. P., Gruszko, J., Guiseppe, V. E., Gusev, K., Hallin, A. L., Hazama, R., Hegai, A., Henning, R., Hoppe, E. W., Howard, S., Howe, M. A., Keeter, K. J., Kidd, M. F., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, S., Martin, R. D., Mertens, S., Mizouni, L., Nomachi, M., Orrell, J. L., OShaughnessy, C., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Pushkin, K., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shanks, B., Shima, T., Shirchenko, M., Snavely, K. J., Snyder, N., Soin, A., Strain, J., Suriano, A. M., Timkin, V., Tornow, W., Varner, R. L., Vasilyev, S., Vetter, K., Vorren, K., White, B. R., Wilkerson, J. F., Xu, W., Yakushev, E., Young, A. R., Yu, C. -H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The {\sc Majorana} collaboration is searching for neutrinoless double beta decay using $^{76}$Ge, which has been shown to have a number of advantages in terms of sensitivities and backgrounds. The observation of neutrinoless double-beta decay would show that lepton number is violated and that neutrinos are Majorana particles and would simultaneously provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region, $15 - 50$ meV, will require large, tonne-scale detectors with extremely low backgrounds, at the level of $\sim$1 count/t-y or lower in the region of the signal. The {\sc Majorana} collaboration, with funding support from DOE Office of Nuclear Physics and NSF Particle Astrophysics, is constructing the {\sc Demonstrator}, an array consisting of 40 kg of p-type point-contact high-purity germanium (HPGe) detectors, of which $\sim$30 kg will be enriched to 87% in $^{76}$Ge. The {\sc Demonstrator} is being constructed in a clean room laboratory facility at the 4850' level (4300 m.w.e.) of the Sanford Underground Research Facility (SURF) in Lead, SD. It utilizes a compact graded shield approach with the inner portion consisting of ultra-clean Cu that is being electroformed and machined underground. The primary aim of the {\sc Demonstrator} is to show the feasibility of a future tonne-scale measurement in terms of backgrounds and scalability., Comment: Proceedings for the MEDEX 2013 Conference

Published
2013

176. A Segmented, Enriched N-type Germanium Detector for Neutrinoless Double Beta-Decay Experiments

Author

Leviner, L. E., Aalseth, C. E., Ahmed, M. W., Avignone III, F. T., Back, H. O., Barabash, A. S., Boswell, M., De Braeckeleer, L., Brudanin, V. B., Chan, Y-D, Egorov, V. G., Elliott, S. R., Gehman, V. M., Hossbach, T. W., Kephart, J. D., Kidd, M. F., Konovalov, S. I., Lesko, K. T., Li, Jingyi, Mei, D-M, Mikhailov, S., Miley, H., Radford, D. C., Reeves, J., Sandukovsky, V. G., Umatov, V. I., Underwood, T. A., Tornow, W., Wu, Y. K., and Young, A. R.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We present data characterizing the performance of the first segmented, N-type Ge detector, isotopically enriched to 85% $^{76}$Ge. This detector, based on the Ortec PT6x2 design and referred to as SEGA (Segmented, Enriched Germanium Assembly), was developed as a possible prototype for neutrinoless double beta-decay measurements by the {\sc Majorana} collaboration. We present some of the general characteristics (including bias potential, efficiency, leakage current, and integral cross-talk) for this detector in its temporary cryostat. We also present an analysis of the resolution of the detector, and demonstrate that for all but two segments there is at least one channel that reaches the {\sc Majorana} resolution goal below 4 keV FWHM at 2039 keV, and all channels are below 4.5 keV FWHM.

Published
2013
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177. CdWO4 crystal scintillators from enriched isotopes for double beta decay experiments

Author

Poda, D. V., Barabash, A. S., Belli, P., Bernabei, R., Boiko, R. S., Brudanin, V. B., Cappella, F., Caracciolo, V., Castellano, S., Cerulli, R., Chernyak, D. M., Danevich, F. A., d'Angelo, S., Degoda, V. Ya., Di Vacri, M. L., Dossovitskiy, A. E., Galashov, E. N., Incicchitti, A., Kobychev, V. V., Konovalov, S. I., Kovtun, G. P., Laubenstein, M., Mikhlin, A. L., Mokina, V. M., Nikolaiko, A. S., Nisi, S., Podviyanuk, R. B., Polischuk, O. G., Shcherban, A. P., Shlegel, V. N., Solopikhin, D. A., Tretyak, V. I., Umatov, V. I., Vasiliev, Ya. V., and Virich, V. D.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Cadmium tungstate crystal scintillators enriched in 106Cd and 116Cd were developed. The produced scintillators exhibit good optical and scintillation properties, and a low level of radioactive contamination. Experiments to search for double beta decay of 106Cd and 116Cd are in progress at the Gran Sasso National Laboratories of the INFN (Italy). Prospects to further improve the radiopurity of the detectors by recrystallization are discussed., Comment: 9 pages, 1 figure (4 eps-figs), 1 table. Accepted for publication in Radiation Measurements as a Proceedings of the 8th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation (LUMDETR 2012), September 09-14, 2012, Halle (Saale), Germany

Published
2013
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178. First measurements of the spectral and angular distribution of transition radiation using a silicon pixel sensor on a Timepix3 chip

Author

Schioppa, E.J., Dachs, F., Alozy, J., Belyaev, N., Campbell, M., Cherry, M., Doronin, S., Filippov, K., Fusco, P., Gargano, F., Heijne, E.H.M., Konovalov, S., Krasnopevtsev, D., Llopart, X., Loparco, F., Mascagna, V., Mazziotta, M.N., Pernegger, H., Ponomarenko, D., Prest, M., Pyatiizbyantseva, D., Radomskii, R., Rembser, C., Romaniouk, A., Shulga, E., Smirnov, S., Smirnov, Y., Soldani, M., Spinelli, P., Sergeeva, D. Yu., Savchenko, A.A., Schaefer, D., Strikhanov, M., Tishchenko, A.A., Teterin, P., Tikhomirov, V., Vallazza, E., van Beuzekom, M., van der Heijden, B., Vorobev, K., and Zhukov, K.

Published
2019
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179. Determination of the accuracy of measuring the energy of charged particles by their path lengths in nuclear emulsion

Author

Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Polukhina, N. G., Pozharova, E. A., Shchedrina, T. V., Smirnitsky, V. A., Starkov, N. I., So, Tan Nang, and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The path lengths of monochromatic muons emerging in the $\pi \to \mu\nu_{\mu} $ decay were measured by the coordinate method with the view to determine their energy by path length. The dispersion of muon energy measurements by this method was $ \sigma_{\mu} = (0.11 \pm 0.01)$ MeV, which corresponds to the accuracy of $ \sigma \approx 2.7%$ of the energy of a charged particle estimated by its path length in nuclear emulsion. The developed method will enable measurements of electron energies in $2\beta $ decay ($\sim 3$ MeV) to an accuracy of $ \sigma \approx 5%$., Comment: 8 pages, 6 figures

Published
2012
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180. The MAJORANA DEMONSTRATOR: Progress towards showing the feasibility of a tonne-scale 76Ge neutrinoless double-beta decay experiment

Author

Finnerty, P., Aguayo, E., Amman, M., Avignone. III, F. T., Barabash, A. S., Barton, P. J., Beene, J. R., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y. -D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Fraenkle, F. M., Galindo-Uribarri, A., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Perumpilly, G., Phillips. II, D. G., Poon, A. W. P., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Timkin, V., Tornow, W., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Yakushev, E., Yaver, H., Young, A. R., and Yumatov., C-H. Yu. and. V.

Subjects
Nuclear Experiment
Abstract

The MAJORANA DEMONSTRATOR will search for the neutrinoless double-beta decay of the 76Ge isotope with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own anti-particle, demonstrate that lepton number is not conserved, and provide information on the absolute mass-scale of the neutrino. The DEMONSTRATOR is being assembled at the 4850 foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be contained in a low-background environment and surrounded by passive and active shielding. The goals for the DEMONSTRATOR are: demonstrating a background rate less than 3 t$^{-1}$ y$^{-1}$ in the 4 keV region of interest (ROI) surrounding the 2039 keV 76Ge endpoint energy; establishing the technology required to build a tonne-scale germanium based double-beta decay experiment; testing the recent claim of observation of neutrinoless double-beta decay [H. V. Klapdor-Kleingrothaus and I. V. Krivosheina, Mod. Phys. Lett. A21, 1547 (2006)]; and performing a direct search for light WIMPs (3-10 GeV)., Comment: 6 pages, 2 figures. Proceedings from the 18th International Symposium on Particles, Strings and Cosmology in Merida, Mexico, June 3-8, 2012. To be published in IOP Conference Series. http://www.fisica.unam.mx/pascos2012/

Published
2012

181. Characteristics of Signals Originating Near the Lithium-Diffused N+ Contact of High Purity Germanium P-Type Point Contact Detectors

Author

The MAJORANA Collaboration, Aguayo, E., Amman, M., Avignone III, F. T., Barabash, A. S., Barton, P. J., Beene, J. R., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y-D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Galindo-Uribarri, A., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., Leon, J., Leviner, L. E., Loach, J. C., Looker, Q., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Perumpilly, G., Phillips II, D. G., Poon, A. W. P., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Timkin, V., Tornow, W., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Yakushev, E., Yaver, H., Young, A. R., Yu, C. -H., and Yumatov, V.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

A study of signals originating near the lithium-diffused n+ contact of p-type point contact (PPC) high purity germanium detectors (HPGe) is presented. The transition region between the active germanium and the fully dead layer of the n+ contact is examined. Energy depositions in this transition region are shown to result in partial charge collection. This provides a mechanism for events with a well defined energy to contribute to the continuum of the energy spectrum at lower energies. A novel technique to quantify the contribution from this source of background is introduced. Experiments that operate germanium detectors with a very low energy threshold may benefit from the methods presented herein., Comment: 32 pages, 14 figures, submitted to Nucl. Instrum. Meth. A

Published
2012

182. The Majorana experiment: an ultra-low background search for neutrinoless double-beta decay

Author

Phillips II, D. G., Aguayo, E., Avignone III, F. T., Back, H. O., Barabash, A. S., Bergevin, M., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y. -D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Y., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hime, A., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Keller, C., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B., LaRoque, B. H., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, S., Marino, M. G., Martin, R. D., Mei, D. -M., Merriman, J., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Poon, A. W. P., Perumpilly, G., Prior, G., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Steele, D., Strain, J., Thomas, K., Timkin, V., Tornow, W., Vanyushin, I., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Wolfe, B. A., Yakushev, E., Young, A. R., Yu, C. -H., Yumatov, V., and Zhang, C.

Subjects
Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the Majorana experiment, known as the Demonstrator, will house 40 kg of Ge in an ultra-low background shielded environment at the 4850' level of the Sanford Underground Laboratory in Lead, SD. The objective of the Demonstrator is to determine whether a future 1-tonne experiment can achieve a background goal of one count per tonne-year in a narrow region of interest around the 76Ge neutrinoless double-beta decay peak., Comment: Presentation for the Rutherford Centennial Conference on Nuclear Physics

Published
2011
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183. The Majorana Demonstrator

Author

Aguayo, E., Fast, J. E., Hoppe, E. W., Keillor, M. E., Kephart, J. D., Kouzes, R. T., LaFerriere, B. D., Merriman, J., Orrell, J. L., Overman, N. R., Avignone III, F. T., Back, H. O., Combs, D. C., Leviner, L. E., Young, A. R., Barabash, A. S., Konovalov, S. I., Vanyushin, I., Yumatov, V., Bergevin, M., Chan, Y-D., Detwiler, J. A., Loach, J. C., Martin, R. D., Poon, A. W. P., Prior, G., Vetter, K., Bertrand, F. E., Cooper, R. J., Radford, D. C., Varner, R. L., Yu, C. -H., Boswell, M., Elliott, S. R., Gehman, V. M., Hime, A., Kidd, M. F., LaRoque, B. H., Rielage, K., Ronquest, M. C., Steele, D., Brudanin, V., Egorov, V., Gusey, K., Kochetov, O., Shirchenko, M., Timkin, V., Yakushev, E., Busch, M., Esterline, J., Tornow, W., Christofferson, C. D., Horton, M., Howard, S., Sobolev, V., Collar, J. I., Fields, N., Creswick, R. J., Doe, P. J., Johnson, R. A., Knecht, A., Leon, J., Marino, M. G., Miller, M. L., Robertson, R. G. H., Schubert, A. G., Wolfe, B. A., Efremenko, Yu., Ejiri, H., Hazama, R., Nomachi, M., Shima, T., Finnerty, P., Fraenkle, F. M., Giovanetti, G. K., Green, M. P., Henning, R., Howe, M. A., MacMullin, S., Phillips II, D. G., Snavely, K. J., Strain, J., Vorren, K., Guiseppe, V. E., Keller, C., Mei, D. -M., Perumpilly, G., Thomas, K., Zhang, C., Hallin, A. L., Keeter, K. J., Mizouni, L., and Wilkerson, J. F.

Subjects
Nuclear Experiment
Abstract

A brief review of the history and neutrino physics of double beta decay is given. A description of the MAJORANA DEMONSTRATOR research and development program including background reduction techniques is presented in some detail. The application of point contact (PC) detectors to the experiment is discussed, including the effectiveness of pulse shape analysis. The predicted sensitivity of a PC detector array enriched to 86% in 76Ge is given., Comment: To be published in the DPF-2011 Conference Proceedings

Published
2011

184. Measurement of $\beta\beta$ Decay-Simulating Events in Nuclear Emulsion with Molybdenum Filling

Author

Ashitkov, V. D., Barabash, A. S., Bradnova, V. Ya., Ditlov, V. A., Dubinina, V. V., Egorenkova, N. P., Konovalov, S. I., Pozharova, E. A., Polukhina, N. G., Smirnitsky, V. A., Starkov, N. I., Chernyavsky, M. M., Shchedrina, T. V., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The measurement of positron--nucleus collisions was used to estimate the possibility of suppressing background events that simulate $\beta\beta$ decay in the emulsion region adjacent to molybdenum conglomerates. The range of the escape of two relativistic particles from the interaction was found to be $ = (0.60\pm 0.03) ~\mu$m, which approximately corresponds to the grain size of developed nuclear emulsion. No correlation of the values of d with the angle between two relativistic particles was observed. It was shown that it was possible to exclude $\beta\beta$ decay background from electrons emerging in the decay of elements of naturally occurring radioactive chains. The background from $\beta$ decays of $^{90}$Sr and $^{40}$K available in emulsion around Mo conglomerates was determined by the ratio of the volume $(\sim d^3)$ to the total volume of emulsion and was found to be $1.5\cdot 10^{-2}$. It was shown that the backgrounds from $^{40}$K, $^{90}$Sr and natural radioactivity could be significantly suppressed and would not limit the sensitivity of the experiment with 1 kg $^{100}$Mo., Comment: 6 pages, 4 figures

Published
2011

185. Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment

Author

The MAJORANA Collaboration, Aguayo, E., Avignone III, F. T., Back, H. O., Barabash, A. S., Bergevin, M., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y-D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hime, A., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Keillor, M. E., Keller, C., Kephart, J. D., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B. D., LaRoque, B. H., Leon, J., Leviner, L. E., Loach, J. C., MacMullin, S., Marino, M. G., Martin, R. D., Mei, D. -M., Merriman, J. H., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N. R., Phillips II, D. G., Poon, A. W. P., Perumpilly, G., Prior, G., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Schubert, A. G., Shima, T., Shirchenko, M., Snavely, K. J., Sobolev, V., Steele, D., Strain, J., Thomas, K., Timkin, V., Tornow, W., Vanyushin, I., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Wolfe, B. A., Yakushev, E., Young, A. R., Yu, C. -H., Yumatov, V., and Zhang, C.

Subjects
Nuclear Experiment
Abstract

Neutrinoless double-beta decay experiments can potentially determine the Majorana or Dirac nature of the neutrino, and aid in understanding the neutrino absolute mass scale and hierarchy. Future 76Ge-based searches target a half-life sensitivity of >10^27 y to explore the inverted neutrino mass hierarchy. Reaching this sensitivity will require a background rate of <1 count tonne^-1 y^-1 in a 4-keV-wide spectral region of interest surrounding the Q value of the decay. We investigate the overburden required to reach this background goal in a tonne-scale experiment with a compact (copper and lead) shield based on Monte Carlo calculations of cosmic-ray background rates. We find that, in light of the presently large uncertainties in these types of calculations, a site with an underground depth >~5200 mwe is required for a tonne-scale experiment with a compact shield similar to the planned 40-kg MAJORANA DEMONSTRATOR. The required overburden is highly dependent on the chosen shielding configuration and could be relaxed significantly if, for example, a liquid cryogen and water shield, or an active neutron shield were employed. Operation of the MAJORANA DEMONSTRATOR and GERDA detectors will serve to reduce the uncertainties on cosmic-ray background rates and will impact the choice of shielding style and location for a future tonne-scale experiment. 4/2013: The peer review process revealed that one of the veto rejection factors (the factor-of-4 described on p12) needs to be better established. Our reevaluation of this parameter to date has not yielded strong support for the value stated in the manuscript, and we require further study to develop a solid estimate. This further study will supersede the work described in this manuscript, and may or may not lead to the same conclusion regarding the ~>5200 mwe requirement for future tonne-scale 76Ge neutrinoless double beta decay experiments., Comment: Corresponding author: J. Detwiler (jasondet@uw.edu), 25 pages, 2 figures

Published
2011

186. The MAJORANA DEMONSTRATOR: A Search for Neutrinoless Double-beta Decay of Germanium-76

Author

MAJORANA Collaboration, Schubert, A. G., Aguayo, E., Avignone III, F. T., Back, H. O., Barabash, A. S., Bergevin, M., Bertrand, F. E., Boswell, M., Brudanin, V., Busch, M., Chan, Y-D., Christofferson, C. D., Collar, J. I., Combs, D. C., Cooper, R. J., Detwiler, J. A., Leon, J., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Esterline, J., Fast, J. E., Fields, N., Finnerty, P., Fraenkle, F. M., Gehman, V. M., Giovanetti, G. K., Green, M. P., Guiseppe, V. E., Gusey, K., Hallin, A. L., Hazama, R., Henning, R., Hime, A., Hoppe, E. W., Horton, M., Howard, S., Howe, M. A., Johnson, R. A., Keeter, K. J., Keillor, M. E., Keller, C., Kephart, J. D., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., LaFerriere, B., LaRoque, B. H., Leviner, L. E., Loach, J. C., MacMullin, S., Marino, M. G., Martin, R. D., Mei, D. -M., Merriman, J., Miller, M. L., Mizouni, L., Nomachi, M., Orrell, J. L., Overman, N., Phillips II, D. G., Poon, A. W. P., Perumpilly, G., Prior, G., Radford, D. C., Rielage, K., Robertson, R. G. H., Ronquest, M. C., Shima, T., Shirchenko, M., Snavely, K. J., Sobolev, V., Steele, D., Strain, J., Thomas, K., Timkin, V., Tornow, W., Vanyushin, I., Varner, R. L., Vetter, K., Vorren, K., Wilkerson, J. F., Wolfe, B. A., Yakushev, E., Young, A. R., Yu, C. ?H., Yumatov, V., and Zhan, C.

Subjects
Nuclear Experiment
Abstract

The observation of neutrinoless double-beta decay would determine whether the neutrino is a Majorana particle and provide information on the absolute scale of neutrino mass. The MAJORANA Collaboration is constructing the DEMONSTRATOR, an array of germanium detectors, to search for neutrinoless double-beta decay of 76-Ge. The DEMONSTRATOR will contain 40 kg of germanium; up to 30 kg will be enriched to 86% in 76-Ge. The DEMONSTRATOR will be deployed deep underground in an ultra-low-background shielded environment. Operation of the DEMONSTRATOR aims to determine whether a future tonne-scale germanium experiment can achieve a background goal of one count per tonne-year in a 4-keV region of interest around the 76-Ge neutrinoless double-beta decay Q-value of 2039 keV., Comment: Submitted to AIP Conference Proceedings, 19th Particles & Nuclei International Conference (PANIC 2011), Massachusetts Institute of Technology, Cambridge, MA, USA, July 24-29, 2011; 3 pages, 1 figure

Published
2011
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187. Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd

Author

Barabash, A. S., Belli, P., Bernabei, R., Boiko, R. S., Cappella, F., Caracciolo, V., Chernyak, D. M., Cerulli, R., Danevich, F. A., Di Vacri, M. L., Dossovitskiy, A. E., Galashov, E. N., Incicchitti, A., Kobychev, V. V., Konovalov, S. I., Kovtun, G. P., Kudovbenko, V. M., Laubenstein, M., Mikhlin, A. L., Nisi, S., Poda, D. V., Podviyanuk, R. B., Polischuk, O. G., Shcherban, A. P., Shlegel, V. N., Solopikhin, D. A., Stenin, Yu. G., Tretyak, V. I., Umatov, V. I., Vasiliev, Ya. V., and Virich, V. D.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

A cadmium tungstate crystal boule enriched in $^{116}$Cd to 82% with mass of 1868 g was grown by the low-thermal-gradient Czochralski technique. The isotopic composition of cadmium and the trace contamination of the crystal were estimated by High Resolution Inductively Coupled Plasma Mass-Spectrometry. The crystal scintillators produced from the boule were subjected to characterization that included measurements of transmittance and energy resolution. A low background scintillation detector with two $^{116}$CdWO$_4$ crystal scintillators (586 g and 589 g) was developed. The detector was running over 1727 h deep underground at the Gran Sasso National Laboratories of the INFN (Italy), which allowed to estimate the radioactive contamination of the enriched crystal scintillators. The radiopurity of a third $^{116}$CdWO$_4$ sample (326 g) was tested with the help of ultra-low background high purity germanium $\gamma$ detector. Monte Carlo simulations of double $\beta$ processes in $^{116}$Cd were used to estimate the sensitivity of an experiment to search for double $\beta$ decay of $^{116}$Cd., Comment: 24 pages, 13 figures, 3 tables, accepted for publication on Journal of Instrumentation

Published
2011
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188. Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

Author

Arnold, R., Augier, C., Baker, J., Barabash, A. S., Basharina-Freshville, A., Blondel, S., Bongrand, M., Broudin-Bay, G., Brudanin, V., Caffrey, A. J., Chapon, A., Chauveau, E., Durand, D., Egorov, V., Flack, R., Garrido, X., Grozier, J., Guillon, B., Hubert, Ph., Jackson, C. M., Jullian, S., Kauer, M., Klimenko, A., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Lang, K., Liptak, Z., Lutter, G., Mamedov, F., Marquet, Ch., Martin-Albo, J., Mauger, F., Mott, J., Nachab, A., Nemchenok, I., Nguyen, C. H., Nova, F., Novella, P., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Reyss, J. L., Richards, B., Ricol, J. S., Saakyan, R., Sarazin, X., Shitov, Yu., Simard, L., Šimkovic, F., Smolnikov, A., Söldner-Rembold, S., Štekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Torre, S., Tretyak, V. I., Umatov, V., Vála, L., Vanyushin, I., Vasiliev, V., Vorobel, V., Vylov, T., and Zukauskas, A.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

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.

Published
2011
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189. A Layer Correlation technique for pion energy calibration at the 2004 ATLAS Combined Beam Test

Author

Abat, E., Abdallah, J. M., Addy, T. N., Adragna, P., Aharrouche, M., Ahmad, A., Akesson, T. P. A., Aleksa, M., Alexa, C., Anderson, K., Andreazza, A., Anghinolfi, F., Antonaki, A., Arabidze, G., Arik, E., Atkinson, T., Baines, J., Baker, O. K., Banfi, D., Baron, S., Barr, A. J., Beccherle, R., Beck, H. P., Belhorma, B., Bell, P. J., Benchekroun, D., Benjamin, D. P., Benslama, K., Kuutmann, E. Bergeaas, Bernabeu, J., Bertelsen, H., Binet, S., Biscarat, C., Boldea, V., Bondarenko, V. G., Boonekamp, M., Bosman, M., Bourdarios, C., Broklova, Z., Chromek, D. Burckhart, Bychkov, V., Callahan, J., Calvet, D., Canneri, M., Garrido, M. Capeáns, Caprini, M., Sas, L. Cardiel, Carli, T., Carminati, L., Carvalho, J., Cascella, M., Castillo, M. V., Catinaccio, A., Cauz, D., Cavalli, D., Sforza, M. Cavalli, Cavasinni, V., Cetin, S. A., Chen, H., Cherkaoui, R., Chevalier, L., Chevallier, F., Chouridou, S., Ciobotaru, M., Citterio, M., Clark, A., Cleland, B., Cobal, M., Cogneras, E., Muino, P. Conde, Consonni, M., Constantinescu, S., Cornelissen, T., Correard, S., Radu, A. Corso, Costa, G., Costa, M. J., Costanzo, D., Cuneo, S., Cwetanski, P., Da Silva, D., Dam, M., Dameri, M., Danielsson, H. O., Dannheim, D., Darbo, G., Davidek, T., De, K., Defay, P. O., Dekhissi, B., Del Peso, J., Del Prete, T., Delmastro, M., Derue, F., Di Ciaccio, L., Di Girolamo, B., Dita, S., Dittus, F., Djama, F., Djobava, T., Dobos, D., Dobson, M., Dolgoshein, B. A., Dotti, A., Drake, G., Drasal, Z., Dressnandt, N., Driouchi, C., Drohan, J., Ebenstein, W. L., Eerola, P., Efthymiopoulos, I., Egorov, K., Eifert, T. F., Einsweiler, K., Kacimi, M. El, Elsing, M., Emelyanov, D., Escobar, C., Etienvre, A. I., Fabich, A., Facius, K., Fakhr-Edine, A. I., Fanti, M., Farbin, A., Farthouat, P., Fassouliotis, D., Fayard, L., Febbraro, R., Fedin, O. L., Fenyuk, A., Fergusson, D., Ferrari, P., Ferrari, R., Ferreira, B. C., Ferrer, A., Ferrere, D., Filippini, G., Flick, T., Fournier, D., Francavilla, P., Francis, D., Froeschl, R., Froidevaux, D., Fullana, E., Gadomski, S., Gagliardi, G., Gagnon, P., Gallas, M., Gallop, B. J., Gameiro, S., Gan, K. K., Garcia, R., Garcia, C., Gavrilenko, I. L., Gemme, C., Gerlach, P., Ghodbane, N., Giakoumopoulou, V., Giangiobbe, V., Giokaris, N., Glonti, G., Goettfert, T., Golling, T., Gollub, N., Gomes, A., Gomez, M. D., Gonzalez-Sevilla, S., Goodrick, M. J., Gorfine, G., Gorini, B., Goujdami, D., Grahn, K-J., Grenier, P., Grigalashvili, N., Grishkevich, Y., Grosse-Knetter, J., Gruwe, M., Guicheney, C., Gupta, A., Haeberli, C., Haertel, R., Hajduk, Z., Hakobyan, H., Hance, M., Hansen, J. D., Hansen, P. H., Hara, K., Harvey Jr., A., Hawkings, R. J., Heinemann, F. E. W., Correia, A. Henriques, Henss, T., Hervas, L., Higon, E., Hill, J. C., Hoffman, J., Hostachy, J. Y., Hruska, I., Hubaut, F., Huegging, F., Hulsbergen, W., Hurwitz, M., Iconomidou-Fayard, L., Jansen, E., Plante, I. Jen-La, Johansson, P. D. C., Jon-And, K., Joos, M., Jorgensen, S., Joseph, J., Kaczmarska, A., Kado, M., Karyukhin, A., Kataoka, M., Kayumov, F., Kazarov, A., Keener, P. T., Kekelidze, G. D., Kerschen, N., Kersten, S., Khomich, A., Khoriauli, G., Khramov, E., Khristachev, A., Khubua, J., Kittelmann, T. H., Klingenberg, R., Klinkby, E. B., Kodys, P., Koffas, T., Kolos, S., Konovalov, S. P., Konstantinidis, N., Kopikov, S., Korolkov, I., Kostyukhin, V., Kovalenko, S., Kowalski, T. Z., Krüger, K., Kramarenko, V., Kudin, L. G., Kulchitsky, Y., Lacasta, C., Lafaye, R., Laforge, B., Lampl, W., Lanni, F., Laplace, S., Lari, T., Bihan, A-C. Le, Lechowski, M., Ledroit-Guillon, F., Lehmann, G., Leitner, R., Lelas, D., Lester, C. G., Liang, Z., Lichard, P., Liebig, W., Lipniacka, A., Lokajicek, M., Louchard, L., Lourerio, K. F., Lucotte, A., Luehring, F., Lund-Jensen, B., Lundberg, B., Ma, H., Mackeprang, R., Maio, A., Maleev, V. P., Malek, F., Mandelli, L., Maneira, J., Mangin-Brinet, M., Manousakis, A., Mapelli, L., Marques, C., Garcia, S. Marti i, Martin, F., Mathes, M., Mazzanti, M., McFarlane, K. W., McPherson, R., Mchedlidze, G., Mehlhase, S., Meirosu, C., Meng, Z., Meroni, C., Mialkovski, V., Mikulec, B., Milstead, D., Minashvili, I., Mindur, B., Mitsou, V. A., Moed, S., Monnier, E., Moorhead, G., Morettini, P., Morozov, S. V., Mosidze, M., Mouraviev, S. V., Moyse, E. W. J., Munar, A., Myagkov, A., Nadtochi, A. V., Nakamura, K., Nechaeva, P., Negri, A., Nemecek, S., Nessi, M., Nesterov, S. Y., Newcomer, F. M., Nikitine, I., Nikolaev, K., Nikolic-Audit, I., Ogren, H., Oh, S. H., Oleshko, S. B., Olszowska, J., Onofre, A., Aranda, C. Padilla, Paganis, S., Pallin, D., Pantea, D., Paolone, V., Parodi, F., Parsons, J., Parzhitskiy, S., Pasqualucci, E., Passmored, S. M., Pater, J., Patrichev, S., Peez, M., Reale, V. Perez, Perini, L., Peshekhonov, V. D., Petersen, J., Petersen, T. C., Petti, R., Phillips, P. W., Pina, J., Pinto, B., Podlyski, F., Poggioli, L., Poppleton, A., Poveda, J., Pralavorio, P., Pribyl, L., Price, M. J., Prieur, D., Puigdengoles, C., Puzo, P., Røhne, O., Ragusa, F., Rajagopalan, S., Reeves, K., Reisinger, I., Rembser, C., Renstrom, P. A. Bruckman. de., Reznicek, P., Ridel, M., Risso, P., Riu, I., Robinson, D., Roda, C., Roe, S., Rohne, O., Romaniouk, A., Rousseau, D., Rozanov, A., Ruiz, A., Rusakovich, N., Rust, D., Ryabov, Y. F., Ryjov, V., Salto, O., Salvachua, B., Salzburger, A., Sandaker, H., Rios, C. Santamarina, Santi, L., Santoni, C., Saraiva, J. G., Sarri, F., Sauvage, G., Says, L. P., Schaefer, M., Schegelsky, V. A., Schiavi, C., Schieck, J., Schlager, G., Schlereth, J., Schmitt, C., Schultes, J., Schwemling, P., Schwindling, J., Seixas, J. M., Seliverstov, D. M., Serin, L., Sfyrla, A., Shalanda, N., Shaw, C., Shin, T., Shmeleva, A., Silva, J., Simion, S., Simonyan, M., Sloper, J. E., Smirnov, S. Yu., Smirnova, L., Solans, C., Solodkov, A., Solovianov, O., Soloviev, I., Sosnovtsev, V. V., Spanó, F., Speckmayer, P., Stancu, S., Stanek, R., Starchenko, E., Straessner, A., Suchkov, S. I., Suk, M., Szczygiel, R., Tarrade, F., Tartarelli, F., Tas, P., Tayalati, Y., Tegenfeldt, F., Teuscher, R., Thioye, M., Tikhomirov, V. O., Timmermans, C. J. W. P., Tisserant, S., Toczek, B., Tremblet, L., Troncon, C., Tsiareshka, P., Tyndel, M., Unel, M. Karagoez., Unal, G., Unel, G., Usai, G., Van Berg, R., Valero, A., Valkar, S., Valls, J. A., Vandelli, W., Vannucci, F., Vartapetian, A., Vassilakopoulos, V. I., Vasilyeva, L., Vazeille, F., Vernocchi, F., Vetter-Cole, Y., Vichou, I., Vinogradov, V., Virzi, J., Vivarelli, I., Vivie, J. B. de., Volpi, M., Anh, T. Vu, Wang, C., Warren, M., Weber, J., Weber, M., Weidberg, A. R., Weingarten, J., Wells, P. S., Werner, P., Wheeler, S., Wiessmann, M., Wilkens, H., Williams, H. H., Wingerter-Seez, I., Yasu, Y., Zaitsev, A., Zenin, A., Zenis, T., Zenonos, Z., Zhang, H., Zhelezko, A., and Zhou, N.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A new method for calibrating the hadron response of a segmented calorimeter is developed and successfully applied to beam test data. It is based on a principal component analysis of energy deposits in the calorimeter layers, exploiting longitudinal shower development information to improve the measured energy resolution. Corrections for invisible hadronic energy and energy lost in dead material in front of and between the calorimeters of the ATLAS experiment were calculated with simulated Geant4 Monte Carlo events and used to reconstruct the energy of pions impinging on the calorimeters during the 2004 Barrel Combined Beam Test at the CERN H8 area. For pion beams with energies between 20 GeV and 180 GeV, the particle energy is reconstructed within 3% and the energy resolution is improved by between 11% and 25% compared to the resolution at the electromagnetic scale., Comment: 36 pages, 12 figures, accepted by JINST

Published
2010
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190. Astroparticle Physics with a Customized Low-Background Broad Energy Germanium Detector

Author

MAJORANA Collaboration, Aalseth, C. E., Amman, M., Avignone III, F. T., Back, H. O., Barabash, A. S., Barbeau, P. S., Bergevin, M., Bertrand, F. E., Boswell, M., Brudanin, V., Bugg, W., Burritt, T. H., Busch, M., Capps, G., Chan, Y-D., Collar, J. I., Cooper, R. J., Creswick, R., Detwiler, J. A., Diaz, J., Doe, P. J., Efremenko, Yu., Egorov, V., Ejiri, H., Elliott, S. R., Ely, J., Esterline, J., Farach, H., Fast, J. E., Fields, N., Finnerty, P., Fujikawa, B., Fuller, E., Gehman, V. M., Giovanetti, G. K., Guiseppe, V. E., Gusey, K., Hallin, A. L., Harper, G. C, Hazama, R., Henning, R., Hime, A., Hoppe, E. W., Hossbach, T. W., Howe, M. A., Johnson, R. A., Keeter, K. J., Keillor, M., Keller, C., Kephart, J. D., Kidd, M. F., Knecht, A., Kochetov, O., Konovalov, S. I., Kouzes, R. T., Leviner, L., Loach, J. C., Luke, P. N., MacMullin, S., Marino, M. G., Martin, R. D., Mei, D. -M., Miley, H. S., Miller, M. L., Mizouni, L., Meyers, A. W., Nomachi, M., Orrell, J. L., Peterson, D., Phillips II, D. G., Poon, A. W. P., Prior, G., Qian, J., Radford, D. C., Rielage, K., Robertson, R. G. H., Rodriguez, L., Rykaczewski, K. P., Salazar, H., Schubert, A. G., Shima, T., Shirchenko, M., Steele, D., Strain, J., Swift, G., Thomas, K., Timkin, V., Tornow, W., Van Wechel, T. D., Vanyushin, I., Varner, R. L., Vetter, K., Wilkerson, J. F., Wolfe, B. A., Xiang, W., Yakushev, E., Yaver, H., Young, A. R., Yu, C. -H., Yumatov, V., Zhang, C., and Zimmerman, S.

Subjects
Nuclear Experiment
Abstract

The MAJORANA Collaboration is building the MAJORANA DEMONSTRATOR, a 60 kg array of high purity germanium detectors housed in an ultra-low background shield at the Sanford Underground Laboratory in Lead, SD. The MAJORANA DEMONSTRATOR will search for neutrinoless double-beta decay of 76Ge while demonstrating the feasibility of a tonne-scale experiment. It may also carry out a dark matter search in the 1-10 GeV/c^2 mass range. We have found that customized Broad Energy Germanium (BEGe) detectors produced by Canberra have several desirable features for a neutrinoless double-beta decay experiment, including low electronic noise, excellent pulse shape analysis capabilities, and simple fabrication. We have deployed a customized BEGe, the MAJORANA Low-Background BEGe at Kimballton (MALBEK), in a low-background cryostat and shield at the Kimballton Underground Research Facility in Virginia. This paper will focus on the detector characteristics and measurements that can be performed with such a radiation detector in a low-background environment., Comment: Submitted to NIMA Proceedings, SORMA XII. 9 pages, 4 figures

Published
2010
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191. Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO

Author

Arnold, R., Augier, C., Baker, J., Barabash, A. S., Basharina-Freshville, A., Bongrand, M., Brudanin, V., Caffrey, A. J., Cebrián, S., Chapon, A., Chauveau, E., Dafni, Th., Deppisch, F. F., Diaz, J., Durand, D., Egorov, V., Evans, J. J., Flack, R., Fushima, K-I., Irastorza, I. García, Garrido, X., Gómez, H., Guillon, B., Holin, A., Holy, K., Horkley, J. J., Hubert, Ph., Hugon, C., Iguaz, F. J., Ishihara, N., Jackson, C. M., Jullian, S., Kauer, M., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lamhamdi, T., Lang, K., Lutter, G., Luzón, G., Mamedov, F., Marquet, Ch., Mauger, F., Monrabal, F., Nachab, A., Nasteva, I., Nemchenok, I., Nguyen, C. H., Nomachi, M., Nova, F., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Povinec, P. P., Richards, B., Ricol, J. S., Riddle, C. L., Rodríguez, A., Saakyan, R., Sarazin, X., Sedgbeer, J. K., Serra, L., Shitov, Yu., Simard, L., Šimkovic, F., Söldner-Rembold, S., Štekl, I., Sutton, C. S., Tamagawa, Y., Thomas, J., Timkin, V., Tretyak, V., Tretyak, Vl. I., Umatov, V. I., Vanyushin, I. A., Vasiliev, R., Vasiliev, V., Vorobel, V., Waters, D., Yahlali, N., and Žukauskas, A.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

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., Comment: 17 pages, 14 figures, to be published in E.P.J. C

Published
2010
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192. Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils

Author

Argyriades, J., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Basharina-Freshville, A., Bongrand, M., Bourgeois, C., Breton, D., Briére, M., Broudin-Bay, G., Brudanin, V. B., Caffrey, A. J., Cebrián, S., Chapon, A., Chauveau, E., Dafni, Th., Díaz, J., Durand, D., Egorov, V. G., Evans, J. J., Flack, R., Fushima, K-I., Irastorza, I. G., Garrido, X., Gómez, H., Guillon, B., Holin, A., Holy, K, Horkey, J. J., Hubert, P., Hugon, C., Iguaz, F. J., Ishihara, N., Jackson, C. M., Jenzer, S., Jullian, S., Kauer, M., Kochetov, O. I., Konovalov, S. I., Kovalenko, V., Lamhamdi, T., Lang, K., Lemiére, Y., Lutter, G., Luzón, G., Mamedov, F., Marquet, Ch., Mauger, F., Monrabal, F., Nachab, A., Nemchenok, I. B., Nguyen, C. H., Nomachi, M., Nova, F., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Povinec, P. P., Richards, B., Ricol, J. S., Riddle, C. L., Rodríguez, A., Saakyan, R., Sarazin, X., Sedgbeer, J. K., Serra, L., Shitov, Yu. A., Simard, L., Šimkovic, F., Söldner-Rembold, S., Štekl, I., Sutton, C. S., Tamagawa, Y., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V., Tretyak, Vl. I., Umatov, V. I., Vála, L., Vanyushin, I. A., Vasiliev, R., Vasiliev, V. A., Vorobel, V., Waters, D., Yahali, N., and Žukauskas, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^{208}$Tl and $^{214}$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in $^{208}$Tl. After more than one year of background measurement, a surface activity of the scintillators of $\mathcal{A}$($^{208}$Tl) $=$ 1.5 $\mu$Bq/m$^2$ is reported here. Given this level of background, a larger BiPo detector having 12 m$^2$ of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of $\mathcal{A}$($^{208}$Tl) $<$ 2 $\mu$Bq/kg (90% C.L.) with a six month measurement., Comment: 24 pages, submitted to N.I.M. A

Published
2010
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193. Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors

Author

Argyriades, J., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin-Bay, G., Brudanin, V. B., Caffrey, A. J., Cebrián, S., Chapon, A., Chauveau, E., Dafni, Th., Daraktchieva, Z., iaz, J. D, Durand, D., Egorov, V. G., Evans, J. J., Fatemi-Ghomi, N., Flack, R., Basharina-Freshville, A., Fushimi, K-I., Garrido, X., Gómez, H., Guillon, B., Holin, A., Holy, K., Horkey, J. J., Hubert, Ph., Hugon, C., Iguaz, F. J., Irastorza, I. G., Ishihara, N., Jackson, C. M., Jullian, S., Kanamaru, S., Kauer, M., Kochetov, O. I., Konovalov, S. I., Kovalenko, V. E., Lalanne, D., Lang, K., ere, Y. Lemi, Lutter, G., Luzón, G., Mamedov, F., Marquet, Ch., Martin-Albo, J., Mauger, F., Monrabal, F., Nachab, A., Nasteva, I., Nemchenok, I. B., Nguyen, C. H., Nova, F., Novella, P., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Povinec, P. P., Richards, B., Ricol, J. S., Riddle, C. L., Rodriguez, A., Saakyan, R., Sarazin, X., Sedgbeer, J. K., Serra, L., Simard, L., Šimkovic, F., Shitov, Yu. A., Smolnikov, A. A., Soldner-Rembold, S., Štekl, I., Sugaya, Y., Sutton, C. S., Szklarz, G., Tamagawa, Y., Thomas, J., Thompson, R., Timkin, V. V., Tretyak, V. I., Tretyak, Vl. I., Umatov, V. I., ala, L. V, Vanyushin, I. A., Vasiliev, R., Vorobel, V., Vylov, Ts., Waters, D., Yahlali, N., and Žukauskas, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

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 article, we briefly describe our modeling approach and results of our studies., Comment: 16 pages, 10 figures

Published
2010
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194. Nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay

Author

Ashitkov, V. D., Bagulya, A. V., Barabash, A. S., Bradnova, V. Ya., Chernyavsky, M. M., Konovalov, S. I., Okat'eva, N. M., Orlova, G. I., Polukhina, N. G., Pozharova, E. A., Smirnitsky, V. A., Starkov, N. I., Vladimirov, M. S., and Umatov, V. I.

Subjects
Nuclear Experiment
Abstract

The usage of nuclear emulsion with molybdenum filling for observation of $\beta\beta$ decay are shown to be possible. Estimates for 1 kg of $^{100}$Mo with zero background give the sensitivity for the $0\nu\beta\beta$ decay of $^{100}$Mo at the level of $\sim 1.5\cdot 10^{24}$ y for 1 year of measurement., Comment: 7 pages, 3 figures

Published
2010
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195. Search for $\beta^+$EC and ECEC processes in $^{112}$Sn

Author

Barabash, A. S., Hubert, Ph., Nachab, A., Konovalov, S. I., and Umatov, V.

Subjects
Nuclear Experiment
Abstract

Limits on $\beta^+$EC (here EC denotes electron capture) and ECEC processes in $^{112}$Sn have been obtained using a 380 cm$^3$ HPGe detector and an external source consisting of 53.355 g enriched tin (94.32% of $^{112}$Sn). A limit with 90% C.L. on the $^{112}$Sn half-life of $4.7\times 10^{20}$ y for the ECEC(0$\nu$) transition to the $0^+_3$ excited state in $^{112}$Cd (1871.0 keV) has been established. This transition is discussed in the context of a possible enhancement of the decay rate by several orders of magnitude given that the ECEC$(0\nu)$ process is nearly degenerate with an excited state in the daughter nuclide. Prospects for investigating such a process in future experiments are discussed. The limits on other $\beta^+$EC and ECEC processes in $^{112}$Sn were obtained on the level of $(0.6-8.7)\times 10^{20}$ y at the 90% C.L., Comment: 14 pages, 4 figures

Published
2009
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196. Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

Author

Argyriades, J., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Basharina-Freshville, A., Bongrand, M., Broudin-Bay, G., Brudanin, V., Caffrey, A. J., Chapon, A., Chauveau, E., Daraktchieva, Z., Durand, D., Egorov, V., Fatemi-Ghomi, N., Flack, R., Guillon, B., Hubert, Ph., Jullian, S., Kauer, M., King, S., Klimenko, A., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Lang, K., Lemiere, Y., Longuemare, C., Lutter, G., Mamedov, F., Marquet, Ch., Martin-Albo, J., Mauger, F., Nachab, A., Nasteva, I., Nemchenok, I., Nguyen, C. H., Nova, F., Novella, P., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Shitov, Yu., Simard, L., Simkovic, F., Smolnikov, A., Snow, S., Soldner-Rembold, S., Stekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V. I., Umatov, V., Vala, L., Vanyushin, I., Vasiliev, V., Vorobel, V., and Vylov, Ts.

Subjects
Nuclear Experiment
Abstract

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., Comment: Published in Nucl.Phys.A (10 pages, 10 figures)

Published
2009
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197. Measurement of the background in the NEMO 3 double beta decay experiment

Author

NEMO Collaboration, Argyriades, J., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin-Bay, G., Brudanin, V. B., Caffrey, A. J., Chapon, A., Chauveau, E., Daraktchieva, Z., Durand, D., Egorov, V. G., Fatemi-Ghomi, N., Flack, R., Freshville, A., Guillon, B., Hubert, Ph., Jullian, S., Kauer, M., King, S., Kochetov, O. I., Konovalov, S. I., Kovalenko, V. E., Lalanne, D., Lang, K., Lemi`ere, Y., Lutter, G., Mamedov, F., Marquet, Ch., Martin-Albo, J., Mauger, F., Nachab, A., Nasteva, I., Nemchenok, I. B., Nova, F., Novella, P., Ohsumi, H., Pahlka, R. B., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Simard, L., Shitov, Yu. A., Smolnikov, A. A., Snow, S., S"oldner-Rembold, S., Stekl, I., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V. V., Tretyak, V. I., Tretyak, Vl. I., Umatov, V. I., V'ala, L., Vanyushin, I. A., Vasiliev, V. A., Vorobel, V., and Vylov, Ts.

Subjects
Nuclear Experiment
Abstract

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., Comment: 32 pages, 23 figures, submitted to NIM A

Published
2009
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200. Measurement of the double-$$\varvec{\beta }$$ decay of $$\varvec{^{150}}$$Nd to the 0$$\varvec{^+_1}$$ excited state of $$\varvec{^{150}}$$Sm in NEMO-3

Author

Aguerre, X., primary, Arnold, R., additional, Augier, C., additional, Barabash, A. S., additional, Basharina-Freshville, A., additional, Blondel, S., additional, Blot, S., additional, Bongrand, M., additional, Breier, R., additional, Brudanin, V., additional, Busto, J., additional, Bystryakov, A., additional, Caffrey, A. J., additional, Cerna, C., additional, Cesar, J. P., additional, Ceschia, M., additional, Chauveau, E., additional, Chopra, A., additional, Dawson, L., additional, Duchesneau, D., additional, Durand, D., additional, Evans, J. J., additional, Flack, R., additional, Franchini, P., additional, Garrido, X., additional, Girard-Carillo, C., additional, Guillon, B., additional, Guzowski, P., additional, Hoballah, M., additional, Hodák, R., additional, Hubert, P., additional, Hussain, M. H., additional, Jullian, S., additional, Klimenko, A., additional, Kochetov, O., additional, Konovalov, S. I., additional, Koňařík, F., additional, Křižák, T., additional, Lalanne, D., additional, Lang, K., additional, Lemière, Y., additional, Li, P., additional, Loaiza, P., additional, Lutter, G., additional, Macko, M., additional, Mamedov, F., additional, Marquet, C., additional, Mauger, F., additional, Minotti, A., additional, Morgan, B., additional, Nemchenok, I., additional, Nomachi, M., additional, Nowacki, F., additional, Ohsumi, H., additional, Oliviéro, G., additional, Palušová, V., additional, Patrick, C., additional, Perrot, F., additional, Petro, M., additional, Pin, A., additional, Piquemal, F., additional, Povinec, P., additional, Pratt, S., additional, Přidal, P., additional, Quinn, W. S., additional, Ramachers, Y. A., additional, Remoto, A., additional, Reyss, J. L., additional, Riddle, C. L., additional, Rukhadze, E., additional, Saakyan, R., additional, Salamatin, A., additional, Salazar, R., additional, Sarazin, X., additional, Sedgbeer, J., additional, Shitov, Yu., additional, Simard, L., additional, Šimkovic, F., additional, Smetana, A., additional, Smolnikov, A., additional, Söldner-Rembold, S., additional, Štekl, I., additional, Suhonen, J., additional, Szklarz, G., additional, Tedjditi, H., additional, Thomas, J., additional, Timkin, V., additional, Tretyak, V. I., additional, Umatov, V. I., additional, Vanushin, I., additional, Vereshchaka, Y., additional, Vorobel, V., additional, Waters, D., additional, and Xie, F., additional

Published
2023
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