Browsing by Author "Breidenbach, M"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Search for Majoron-emitting modes of $^{136}$Xe double beta decay with the complete EXO-200 dataset
    Kharusi, S Al; Anton, G; Badhrees, I; Barbeau, PS; Beck, D; Belov, V; Bhatta, T; Breidenbach, M; Brunner, T; Cao, GF; Cen, WR; Chambers, C; Cleveland, B; Coon, M; Craycraft, A; Daniels, T; Darroch, L; Daugherty, SJ; Davis, J; Delaquis, S; Mesrobian-Kabakian, A Der; DeVoe, R; Dilling, J; Dolgolenko, A; Dolinski, MJ; Echevers, J; Jr, W Fairbank; Fairbank, D; Farine, J; Feyzbakhsh, S; Fierlinger, P; Fudenberg, D; Gautam, P; Gornea, R; Gratta, G; Hall, C; Hansen, EV; Hoessl, J; Hufschmidt, P; Hughes, M; Iverson, A; Jamil, A; Jessiman, C; Jewell, MJ; Johnson, A; Karelin, A; Kaufman, LJ; Koffas, T; ucken, R Kr; Kuchenkov, A; Kumar, KS; Lan, Y; Larson, A; Lenardo, BG; Leonard, DS; Li, GS; Li, S; Li, Z; Licciardi, C; Lin, YH; MacLellan, R; McElroy, T; Michel, T; Mong, B; Moore, DC; Murray, K; Njoya, O; Nusair, O; Odian, A; Ostrovskiy, I; Perna, A; Piepke, A; Pocar, A; Retiere, F; Robinson, AL; Rowson, PC; Rudde, D; Runge, J; Schmidt, S; Sinclair, D; Skarpaas, K; Soma, AK; Stekhanov, V; Tarka, M; Thibado, S; Todd, J; Tolba, T; Totev, TI; Tsang, R; Veenstra, B; Veeraraghavan, V; Vogel, P; Vuilleumier, J-L; Wagenpfeil, M; Watkins, J; Weber, M; Wen, LJ; Wichoski, U; Wrede, G; Wu, SX; Xia, Q; Yahne, DR; Yang, L; Yen, Y-R; Zeldovich, O Ya; Ziegler, T
    A search for Majoron-emitting modes of the neutrinoless double-beta decay of $^{136}$Xe is performed with the full EXO-200 dataset. This dataset consists of a total $^{136}$Xe exposure of 234.1 kg$\cdot$yr, and includes data with detector upgrades that have improved the energy threshold relative to previous searches. A lower limit of T$_{1/2}^{\rm{^{136}Xe}}>$4.3$\cdot$10$^{24}$ yr at 90\% C.L. on the half-life of the spectral index $n=1$ Majoron decay was obtained, a factor of 3.6 more stringent than the previous limit from EXO-200, corresponding to a constraint on the Majoron-neutrino coupling constant of $|\langle g_{ee}^{M}\rangle|$$<(0.4$-$0.9)\cdot10^{-5}$. The lower threshold and the additional data taken resulted in a factor 8.4 improvement for the $n=7$ mode compared to the previous EXO search. This search provides the most stringent limits to-date on the Majoron-emitting decays of $^{136}$Xe with spectral indices $n=1,2,3,$ and 7.
  • Thumbnail Image
    ItemOpen Access
    The EXO-200 detector, part II: Auxiliary Systems
    Ackerman, N; Albert, J; Auger, M; Auty, DJ; Badhrees, I; Barbeau, PS; Bartoszek, L; Baussan, E; Belov, V; Benitez-Medina, C; Bhatta, T; Breidenbach, M; Brunner, T; Cao, GF; Cen, WR; Chambers, C; Cleveland, B; Conley, R; Cook, S; Coon, M; Craddock, W; Craycraft, A; Cree, W; Daniels, T; Darroch, L; Daugherty, SJ; Daughhetee, J; Davis, CG; Davis, J; Delaquis, S; Mesrobian-Kabakian, A Der; deVoe, R; Didberidze, T; Dilling, J; Dobi, A; Dolgolenko, AG; Dolinski, MJ; Dunford, M; Echevers, J; Espic, L; Jr, W Fairbank; Fairbank, D; Farine, J; Feldmeier, W; Feyzbakhsh, S; Fierlinger, P; Fouts, K; Franco, D; Freytag, D; Fudenberg, D; Gautam, P; Giroux, G; Gornea, R; Graham, K; Gratta, G; Hagemann, C; Hall, C; Hall, K; Haller, G; Hansen, EV; Hargrove, C; Herbst, R; Herrin, S; Hodgson, J; Hughes, M; Iverson, A; Jamil, A; Jessiman, C; Jewell, MJ; Johnson, A; Johnson, TN; Johnston, S; Karelin, A; Kaufman, LJ; Killick, R; Koffas, T; Kravitz, S; Krücken, R; Kuchenkov, A; Kumar, KS; Lan, Y; Larson, A; Leonard, DS; Leonard, F; LePort, F; Li, GS; Li, S; Li, Z; Licciardi, C; Lin, YH; Mackay, D; MacLellan, R; Marino, M; Martin, J-M; Martin, Y; McElroy, T; McFarlane, K; Michel, T; Mong, B; Moore, DC; Murray, K; Neilson, R; Njoya, O; Nusair, O; O'Sullivan, K; Odian, A; Ostrovskiy, I; Ouellet, C; Piepke, A; Pocar, A; Prescott, CY; Pushkin, K; Retiere, F; Rivas, A; Robinson, AL; Rollin, E; Rowson, PC; Rozo, MP; Runge, J; Russell, JJ; Schmidt, S; Schubert, A; Sinclair, D; Skarpaas, K; Slutsky, S; Smith, E; Soma, AK; Stekhanov, V; Strickland, V; Swift, M; Tarka, M; Todd, J; Tolba, T; Tosi, D; Totev, TI; Tsang, R; Twelker, K; Veenstra, B; Veeraraghavan, V; Vuilleumier, J-L; Vuilleumier, J-M; Wagenpfeil, M; Waite, A; Walton, J; Walton, T; Wamba, K; Watkins, J; Weber, M; Wen, LJ; Wichoski, U; Wittgen, M; Wodin, J; Wood, J; Wrede, G; Wu, SX; Xia, Q; Yang, L; Yen, Y-R; Zeldovich, O Ya; Ziegler, T
    The EXO-200 experiment searched for neutrinoless double-beta decay of $^{136}$Xe with a single-phase liquid xenon detector. It used an active mass of 110 kg of 80.6%-enriched liquid xenon in an ultra-low background time projection chamber with ionization and scintillation detection and readout. This paper describes the design and performance of the various support systems necessary for detector operation, including cryogenics, xenon handling, and controls. Novel features of the system were driven by the need to protect the thin-walled detector chamber containing the liquid xenon, to achieve high chemical purity of the Xe, and to maintain thermal uniformity across the detector.