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14 results on '"Vanyushin, I. A."'

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

Author

Collaboration, The MAJORANA, Collaboration, The MAJORANA, Aguayo, E, III, FT Avignone, Back, HO, Barabash, AS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Busch, M, Chan, Y-D, Christofferson, CD, Collar, JI, Combs, DC, Cooper, RJ, Detwiler, JA, Doe, PJ, Efremenko, Yu, Egorov, V, Ejiri, H, Elliott, SR, Esterline, J, Fast, JE, Fields, N, Finnerty, P, Fraenkle, FM, Gehman, VM, Giovanetti, GK, Green, MP, Guiseppe, VE, Gusey, K, Hallin, AL, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Horton, M, Howard, S, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, ME, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, LaFerriere, BD, LaRoque, BH, Leon, J, Leviner, LE, Loach, JC, MacMullin, S, Marino, MG, Martin, RD, Mei, D-M, Merriman, JH, Miller, ML, Mizouni, L, Nomachi, M, Orrell, JL, Overman, NR, II, DG Phillips, Poon, AWP, Perumpilly, G, Prior, G, Radford, DC, Rielage, K, Robertson, RGH, Ronquest, MC, Schubert, AG, Shima, T, Shirchenko, M, Snavely, KJ, Sobolev, V, Steele, D, Strain, J, Thomas, K, Timkin, V, Tornow, W, Vanyushin, I, Varner, RL, Vetter, K, Vorren, K, Wilkerson, JF, Wolfe, BA, Yakushev, E, Young, AR, Yu, C-H, Yumatov, V, Zhang, C, Collaboration, The MAJORANA, Collaboration, The MAJORANA, Aguayo, E, III, FT Avignone, Back, HO, Barabash, AS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Busch, M, Chan, Y-D, Christofferson, CD, Collar, JI, Combs, DC, Cooper, RJ, Detwiler, JA, Doe, PJ, Efremenko, Yu, Egorov, V, Ejiri, H, Elliott, SR, Esterline, J, Fast, JE, Fields, N, Finnerty, P, Fraenkle, FM, Gehman, VM, Giovanetti, GK, Green, MP, Guiseppe, VE, Gusey, K, Hallin, AL, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Horton, M, Howard, S, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, ME, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, LaFerriere, BD, LaRoque, BH, Leon, J, Leviner, LE, Loach, JC, MacMullin, S, Marino, MG, Martin, RD, Mei, D-M, Merriman, JH, Miller, ML, Mizouni, L, Nomachi, M, Orrell, JL, Overman, NR, II, DG Phillips, Poon, AWP, Perumpilly, G, Prior, G, Radford, DC, Rielage, K, Robertson, RGH, Ronquest, MC, Schubert, AG, Shima, T, Shirchenko, M, Snavely, KJ, Sobolev, V, Steele, D, Strain, J, Thomas, K, Timkin, V, Tornow, W, Vanyushin, I, Varner, RL, Vetter, K, Vorren, K, Wilkerson, JF, Wolfe, BA, Yakushev, E, Young, AR, Yu, C-H, Yumatov, V, and Zhang, C

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.

Published
2011

2. Astroparticle physics with a customized low-background broad energy Germanium detector

Author

Aalseth, CE, Aalseth, CE, Amman, M, Avignone, FT, Back, HO, Barabash, AS, Barbeau, PS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Bugg, W, Burritt, TH, Busch, M, Capps, G, Chan, YD, Collar, JI, Cooper, RJ, Creswick, R, Detwiler, JA, Diaz, J, Doe, PJ, Efremenko, Y, Egorov, V, Ejiri, H, Elliott, SR, Ely, J, Esterline, J, Farach, H, Fast, JE, Fields, N, Finnerty, P, Fujikawa, B, Fuller, E, Gehman, VM, Giovanetti, GK, Guiseppe, VE, Gusey, K, Hallin, AL, Harper, GC, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Hossbach, TW, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, M, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, Leviner, L, Loach, JC, Luke, PN, MacMullin, S, Marino, MG, Martin, RD, Mei, DM, Miley, HS, Miller, ML, Mizouni, L, Meyers, AW, Nomachi, M, Orrell, JL, Peterson, D, Phillips, DG, Poon, AWP, Prior, G, Qian, J, Radford, DC, Rielage, K, Robertson, RGH, Rodriguez, L, Rykaczewski, KP, Salazar, H, Schubert, AG, Shima, T, Shirchenko, M, Steele, D, Strain, J, Swift, G, Thomas, K, Timkin, V, Tornow, W, Van Wechel, TD, Vanyushin, I, Varner, RL, Vetter, K, Wilkerson, JF, Wolfe, BA, Xiang, W, Yakushev, E, Yaver, H, Young, AR, Yu, CH, Yumatov, V, Aalseth, CE, Aalseth, CE, Amman, M, Avignone, FT, Back, HO, Barabash, AS, Barbeau, PS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Bugg, W, Burritt, TH, Busch, M, Capps, G, Chan, YD, Collar, JI, Cooper, RJ, Creswick, R, Detwiler, JA, Diaz, J, Doe, PJ, Efremenko, Y, Egorov, V, Ejiri, H, Elliott, SR, Ely, J, Esterline, J, Farach, H, Fast, JE, Fields, N, Finnerty, P, Fujikawa, B, Fuller, E, Gehman, VM, Giovanetti, GK, Guiseppe, VE, Gusey, K, Hallin, AL, Harper, GC, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Hossbach, TW, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, M, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, Leviner, L, Loach, JC, Luke, PN, MacMullin, S, Marino, MG, Martin, RD, Mei, DM, Miley, HS, Miller, ML, Mizouni, L, Meyers, AW, Nomachi, M, Orrell, JL, Peterson, D, Phillips, DG, Poon, AWP, Prior, G, Qian, J, Radford, DC, Rielage, K, Robertson, RGH, Rodriguez, L, Rykaczewski, KP, Salazar, H, Schubert, AG, Shima, T, Shirchenko, M, Steele, D, Strain, J, Swift, G, Thomas, K, Timkin, V, Tornow, W, Van Wechel, TD, Vanyushin, I, Varner, RL, Vetter, K, Wilkerson, JF, Wolfe, BA, Xiang, W, Yakushev, E, Yaver, H, Young, AR, Yu, CH, and Yumatov, V

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 110 GeV/c2 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. © 2010 Elsevier B.V.

Published
2011

3. 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., Zukauskas, A., 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.

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
Full Text
View/download PDF

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

Author

Collaboration, The MAJORANA, Collaboration, The MAJORANA, Aguayo, E, III, FT Avignone, Back, HO, Barabash, AS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Busch, M, Chan, Y-D, Christofferson, CD, Collar, JI, Combs, DC, Cooper, RJ, Detwiler, JA, Doe, PJ, Efremenko, Yu, Egorov, V, Ejiri, H, Elliott, SR, Esterline, J, Fast, JE, Fields, N, Finnerty, P, Fraenkle, FM, Gehman, VM, Giovanetti, GK, Green, MP, Guiseppe, VE, Gusey, K, Hallin, AL, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Horton, M, Howard, S, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, ME, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, LaFerriere, BD, LaRoque, BH, Leon, J, Leviner, LE, Loach, JC, MacMullin, S, Marino, MG, Martin, RD, Mei, D-M, Merriman, JH, Miller, ML, Mizouni, L, Nomachi, M, Orrell, JL, Overman, NR, II, DG Phillips, Poon, AWP, Perumpilly, G, Prior, G, Radford, DC, Rielage, K, Robertson, RGH, Ronquest, MC, Schubert, AG, Shima, T, Shirchenko, M, Snavely, KJ, Sobolev, V, Steele, D, Strain, J, Thomas, K, Timkin, V, Tornow, W, Vanyushin, I, Varner, RL, Vetter, K, Vorren, K, Wilkerson, JF, Wolfe, BA, Yakushev, E, Young, AR, Yu, C-H, Yumatov, V, Zhang, C, Collaboration, The MAJORANA, Collaboration, The MAJORANA, Aguayo, E, III, FT Avignone, Back, HO, Barabash, AS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Busch, M, Chan, Y-D, Christofferson, CD, Collar, JI, Combs, DC, Cooper, RJ, Detwiler, JA, Doe, PJ, Efremenko, Yu, Egorov, V, Ejiri, H, Elliott, SR, Esterline, J, Fast, JE, Fields, N, Finnerty, P, Fraenkle, FM, Gehman, VM, Giovanetti, GK, Green, MP, Guiseppe, VE, Gusey, K, Hallin, AL, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Horton, M, Howard, S, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, ME, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, LaFerriere, BD, LaRoque, BH, Leon, J, Leviner, LE, Loach, JC, MacMullin, S, Marino, MG, Martin, RD, Mei, D-M, Merriman, JH, Miller, ML, Mizouni, L, Nomachi, M, Orrell, JL, Overman, NR, II, DG Phillips, Poon, AWP, Perumpilly, G, Prior, G, Radford, DC, Rielage, K, Robertson, RGH, Ronquest, MC, Schubert, AG, Shima, T, Shirchenko, M, Snavely, KJ, Sobolev, V, Steele, D, Strain, J, Thomas, K, Timkin, V, Tornow, W, Vanyushin, I, Varner, RL, Vetter, K, Vorren, K, Wilkerson, JF, Wolfe, BA, Yakushev, E, Young, AR, Yu, C-H, Yumatov, V, and Zhang, C

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.

Published
2011

5. Astroparticle physics with a customized low-background broad energy Germanium detector

Author

Aalseth, CE, Aalseth, CE, Amman, M, Avignone, FT, Back, HO, Barabash, AS, Barbeau, PS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Bugg, W, Burritt, TH, Busch, M, Capps, G, Chan, YD, Collar, JI, Cooper, RJ, Creswick, R, Detwiler, JA, Diaz, J, Doe, PJ, Efremenko, Y, Egorov, V, Ejiri, H, Elliott, SR, Ely, J, Esterline, J, Farach, H, Fast, JE, Fields, N, Finnerty, P, Fujikawa, B, Fuller, E, Gehman, VM, Giovanetti, GK, Guiseppe, VE, Gusey, K, Hallin, AL, Harper, GC, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Hossbach, TW, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, M, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, Leviner, L, Loach, JC, Luke, PN, MacMullin, S, Marino, MG, Martin, RD, Mei, DM, Miley, HS, Miller, ML, Mizouni, L, Meyers, AW, Nomachi, M, Orrell, JL, Peterson, D, Phillips, DG, Poon, AWP, Prior, G, Qian, J, Radford, DC, Rielage, K, Robertson, RGH, Rodriguez, L, Rykaczewski, KP, Salazar, H, Schubert, AG, Shima, T, Shirchenko, M, Steele, D, Strain, J, Swift, G, Thomas, K, Timkin, V, Tornow, W, Van Wechel, TD, Vanyushin, I, Varner, RL, Vetter, K, Wilkerson, JF, Wolfe, BA, Xiang, W, Yakushev, E, Yaver, H, Young, AR, Yu, CH, Yumatov, V, Aalseth, CE, Aalseth, CE, Amman, M, Avignone, FT, Back, HO, Barabash, AS, Barbeau, PS, Bergevin, M, Bertrand, FE, Boswell, M, Brudanin, V, Bugg, W, Burritt, TH, Busch, M, Capps, G, Chan, YD, Collar, JI, Cooper, RJ, Creswick, R, Detwiler, JA, Diaz, J, Doe, PJ, Efremenko, Y, Egorov, V, Ejiri, H, Elliott, SR, Ely, J, Esterline, J, Farach, H, Fast, JE, Fields, N, Finnerty, P, Fujikawa, B, Fuller, E, Gehman, VM, Giovanetti, GK, Guiseppe, VE, Gusey, K, Hallin, AL, Harper, GC, Hazama, R, Henning, R, Hime, A, Hoppe, EW, Hossbach, TW, Howe, MA, Johnson, RA, Keeter, KJ, Keillor, M, Keller, C, Kephart, JD, Kidd, MF, Knecht, A, Kochetov, O, Konovalov, SI, Kouzes, RT, Leviner, L, Loach, JC, Luke, PN, MacMullin, S, Marino, MG, Martin, RD, Mei, DM, Miley, HS, Miller, ML, Mizouni, L, Meyers, AW, Nomachi, M, Orrell, JL, Peterson, D, Phillips, DG, Poon, AWP, Prior, G, Qian, J, Radford, DC, Rielage, K, Robertson, RGH, Rodriguez, L, Rykaczewski, KP, Salazar, H, Schubert, AG, Shima, T, Shirchenko, M, Steele, D, Strain, J, Swift, G, Thomas, K, Timkin, V, Tornow, W, Van Wechel, TD, Vanyushin, I, Varner, RL, Vetter, K, Wilkerson, JF, Wolfe, BA, Xiang, W, Yakushev, E, Yaver, H, Young, AR, Yu, CH, and Yumatov, V

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 110 GeV/c2 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. © 2010 Elsevier B.V.

Published
2011

6. 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., Zukauskas, A., 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.

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
Full Text
View/download PDF

7. 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., Žukauskas, A., 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.

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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8. 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., Žukauskas, A., 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.

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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9. 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., Žukauskas, A., 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.

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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10. 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., Žukauskas, A., 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.

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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11. Measurement of the double-beta decay half-life on Nd-150 and search for neutrinoless decay modes with the NEMO-3 detector

Author

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

Abstract

The half-life for double-beta decay of Nd-150 has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of Nd-150, we measured the half-life for 2 nu beta beta decay to be T-1/2(2 nu) = (9.11(-0.22)(+0.25)(stat.) +/- 0.63(syst.)) x 10(18) yr. The observed limit on the half-life for neutrinoless double-beta decay is found to be T-1/2(0 nu) > 1.8 x 10(22) yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of < m(nu)> < 4.0-6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents, and transitions to excited states.

Published
2009

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

Author

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

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.

Published
2009

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

Author

Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin, G., Brudanin, V., Caffrey, A. J., Egorov, V., Etienvre, A. I., Fatemi-Ghomi, N., Hubert, F., Hubert, Ph., Jerie, J., Jollet, C., Jullian, S., King, S., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Leccia, F., Lemi`ere, Y., Longuemare, C., Lutter, G., Marquet, Ch., Mauger, F., Nachab, A., Ohsumi, H., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Simard, L., Simkovic, F., Shitov, Yu., Smolnikov, A., S"oldner-Rembold, S., Stekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V., Umatov, V., V'ala, L., Vanyushin, I., Vasiliev, V., Vorobel, V., Vylov, Ts., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin, G., Brudanin, V., Caffrey, A. J., Egorov, V., Etienvre, A. I., Fatemi-Ghomi, N., Hubert, F., Hubert, Ph., Jerie, J., Jollet, C., Jullian, S., King, S., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Leccia, F., Lemi`ere, Y., Longuemare, C., Lutter, G., Marquet, Ch., Mauger, F., Nachab, A., Ohsumi, H., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Simard, L., Simkovic, F., Shitov, Yu., Smolnikov, A., S"oldner-Rembold, S., Stekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V., Umatov, V., V'ala, L., Vanyushin, I., Vasiliev, V., Vorobel, V., and Vylov, Ts.

Abstract

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 decay to the excited 0^+_1 state has been found. The corresponding half-life limit is T^(0nu)_1/2(0^+ --> 0^+_1) > 8.9 x 10^22 y (at 90% C.L.). The search for the double beta decay to the 2^+_1 excited state has allowed the determination of limits on the half-life for the two neutrino mode T^(2nu)_1/2(0^+ --> 2^+_1) > 1.1 x 10^21 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)_1/2(0^+ --> 2^+_1) > 1.6 x 10^23 y (at 90% C.L.)., Comment: 23 pages, 7 figures, 4 tables, submitted to Nucl. Phys

Published
2006
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14. Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

Author

Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin, G., Brudanin, V., Caffrey, A. J., Egorov, V., Etienvre, A. I., Fatemi-Ghomi, N., Hubert, F., Hubert, Ph., Jerie, J., Jollet, C., Jullian, S., King, S., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Leccia, F., Lemi`ere, Y., Longuemare, C., Lutter, G., Marquet, Ch., Mauger, F., Nachab, A., Ohsumi, H., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Simard, L., Simkovic, F., Shitov, Yu., Smolnikov, A., S"oldner-Rembold, S., Stekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V., Umatov, V., V'ala, L., Vanyushin, I., Vasiliev, V., Vorobel, V., Vylov, Ts., Arnold, R., Augier, C., Baker, J., Barabash, A. S., Bongrand, M., Broudin, G., Brudanin, V., Caffrey, A. J., Egorov, V., Etienvre, A. I., Fatemi-Ghomi, N., Hubert, F., Hubert, Ph., Jerie, J., Jollet, C., Jullian, S., King, S., Kochetov, O., Konovalov, S. I., Kovalenko, V., Lalanne, D., Lamhamdi, T., Leccia, F., Lemi`ere, Y., Longuemare, C., Lutter, G., Marquet, Ch., Mauger, F., Nachab, A., Ohsumi, H., Perrot, F., Piquemal, F., Reyss, J. L., Ricol, J. S., Saakyan, R., Sarazin, X., Simard, L., Simkovic, F., Shitov, Yu., Smolnikov, A., S"oldner-Rembold, S., Stekl, I., Suhonen, J., Sutton, C. S., Szklarz, G., Thomas, J., Timkin, V., Tretyak, V., Umatov, V., V'ala, L., Vanyushin, I., Vasiliev, V., Vorobel, V., and Vylov, Ts.

Abstract

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 decay to the excited 0^+_1 state has been found. The corresponding half-life limit is T^(0nu)_1/2(0^+ --> 0^+_1) > 8.9 x 10^22 y (at 90% C.L.). The search for the double beta decay to the 2^+_1 excited state has allowed the determination of limits on the half-life for the two neutrino mode T^(2nu)_1/2(0^+ --> 2^+_1) > 1.1 x 10^21 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)_1/2(0^+ --> 2^+_1) > 1.6 x 10^23 y (at 90% C.L.)., Comment: 23 pages, 7 figures, 4 tables, submitted to Nucl. Phys

Published
2006
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