Department of Physics

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Browsing Department of Physics by Author "Abrahao, T."

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    Characterization of the spontaneous light emission of the PMTs used in the Double Chooz experiment
    Abe, Y.; Abrahao, T.; Almazan, H.; Alt, C.; Appel, S.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Calvo, E.; Camilleri, Leslie; Carr, Rachel E.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conover, E.; Conrad, Janet M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; de Kerret, H.; Dhooghe, J.; Dietrich, D.; Djurcic, Zelimir; dos Anjos, J. C.; Dracos, M.; Etenko, A.; Fallot, M.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Haag, N.; Hara, T.; Haser, J.; Hellwig, D.; Hofmann, M.; Horton-Smith, Glenn A.; Hourlier, A.; Ishitsuka, M.; Jiménez, S.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Lucht, S.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Navas-Nicolás, D.; Novella, P.; Nunokawa, H.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, Marjorie Hansen; Sharankova, R.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Smith, E.; Soiron, M.; Spitz, Joshua; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Strait, M.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. T.; Valdiviesso, G. A.; Vassilopoulos, N.; Verdugo, A.; Veyssiere, C.; Vivier, M.; von Feilitzsch, F.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (IOP, 2016-08-01)
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    Measurement of theta(13) in Double Chooz using neutron captures on hydrogen with novel background rejection techniques
    Abe, Y.; Appel, S.; Abrahao, T.; Almazan, H.; Alt, C.; dos Anjos, J. C.; Barriere, J. C.; Baussan, E.; Bekman, I.; Bergevin, M.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Camilleri, Leslie; Carr, Rachel E.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Collin, A. P.; Conrad, Janet M.; Crespo-Anadon, J. I.; Crum, K.; Cucoanes, A. S.; Damon, E.; Dawson, J. V.; Dhooghe, J.; Dietrich, D.; Djurcic, Zelimir; Dracos, M.; Etenko, A.; Fallot, M.; von Feilitzsch, F.; Felde, J.; Fernandes, S. M.; Fischer, V.; Franco, D.; Franke, M.; Furuta, H.; Gil-Botella, I.; Giot, L.; Goger-Neff, M.; Gomez, H.; Gonzalez, L. F. G.; Goodenough, L.; Goodman, M. C.; Haag, N.; Hara, T.; Haser, J.; Hellwig, D.; Hofmann, M.; Horton-Smith, Glenn A.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Kaether, F.; Kalousis, L. N.; Kamyshkov, Y.; Kaneda, M.; Kaplan, D. M.; Kawasaki, T.; Kemp, E.; de Kerret, H.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H. P.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Lucht, S.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Minotti, A.; Nagasaka, Y.; Navas-Nicolás, D.; Novella, P.; Oberauer, L.; Obolensky, M.; Onillon, A.; Osborn, A.; Palomares, C.; Pepe, I. M.; Perasso, S.; Porta, A.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Roehling, M.; Roncin, R.; Rybolt, B.; Sakamoto, Y.; Santorelli, R.; Schilithz, A. C.; Schoenert, S.; Schoppmann, S.; Shaevitz, Marjorie Hansen; Sharankova, R.; Shrestha, D.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Smith, E.; Soiron, M.; Spitz, Joshua; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Strait, M.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Thi, H. H. T.; Valdiviesso, G. A.; Vassilopoulos, N.; Veyssiere, C.; Vivier, M.; Wagner, S.; Walsh, N.; Watanabe, H.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F.; Zimmer, V. (Springer, 2016-01-27)
    The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ13 using reactor νe observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor νe without gadolinium loading. Spectral distortions from the νe reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of sin2 2θ13 = 0.095+0.038−0.039(stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of sin2 2θ13 = 0.088 ± 0.033(stat+syst).
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    Yields and production rates of cosmogenic Li-9 and He-8 measured with the Double Chooz near and far detectors
    de Kerret, H.; Abrahao, T.; Almazan, H.; dos Anjos, J. C.; Appel, S.; Barriere, J. C.; Bekman, I.; Bezerra, T. J. C.; Bezrukhov, Leonid B.; Blucher, E.; Brugiere, T.; Buck, C.; Busenitz, J.; Cabrera, A.; Cerrada, M.; Chauveau, E.; Chimenti, P.; Corpace, O.; Dawson, J. V.; Djurcic, Zelimir; Etenko, A.; Franco, D.; Furuta, H.; Gil-Botella, I.; Givaudan, A.; Gomez, H.; Gonzalez, L. F. G.; Goodman, M. C.; Hara, T.; Haser, J.; Hellwig, D.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Kale, K.; Kaneda, M.; Karakac, M.; Kawasaki, T.; Kemp, E.; Kryn, D.; Kuze, M.; Lachenmaier, Tobias; Lane, C. E.; Lasserre, T.; Lastoria, C.; Lhuillier, D.; Lima, H. P., Jr.; Lindner, M.; Lopez-Castano, J. M.; LoSecco, J. M.; Lubsandorzhiev, B. K.; Maeda, J.; Mariani, Camillo; Maricic, Jelena; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Navas-Nicolás, D.; Novella, P.; Nunokawa, H.; Oberauer, L.; Obolensky, M.; Onillon, A.; Oralbaev, A.; Palomares, C.; Pepe, I. M.; Pronost, G.; Reichenbacher, J.; Reinhold, B.; Settimo, M.; Schoenert, S.; Schoppmann, S.; Scola, L.; Sharankova, R.; Sibille, V.; Sinev, V.; Skorokhvatov, Mikhail D.; Soldin, P.; Stahl, A.; Stancu, Ion; Stokes, Lee F. F.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Tonazzo, A.; Veyssiere, C.; Viaud, B.; Vivier, M.; Wagner, S.; Wiebusch, C.; Wurm, M.; Yang, G.; Yermia, F. (Springer, 2018-11-08)
    The yields and production rates of the radioisotopes Li-9 and He-8 created by cosmic muon spallation on C-12, have been measured by the two detectors of the Double Chooz experiment. The identical detectors are located at separate sites and depths, which means that they are subject to different muon spectra. The near (far) detector has an overburden of approximate to 120 m.w.e. (approximate to 300 m.w.e.) corresponding to a mean muon energy of 32.1 +/- 2.0 GeV (63.7 +/- 5.5 GeV). Comparing the data to a detailed simulation of the Li-9 and He-8 decays, the contribution of the He-8 radioisotope at both detectors is found to be compatible with zero. The observed Li-9 yields in the near and far detectors are 5.51 +/- 0.51 and 7.90 +/- 0.51, respectively, in units of 10(-8-1)g(-1)cm(2). The shallow overburdens of the near and far detectors give a unique insight when combined with measurements by KamLAND and Borexino to give the first multi-experiment, data driven relationship between the Li-9 yield and the mean muon energy according to the power law and Y-0 = (0.43 +/- 0.11) x 10(-8-1)g(-1)cm(2). This relationship gives future liquid scintillator based experiments the ability to predict their cosmogenic Li-9 background rates.