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1. The EXO-200 detector, part II: Auxiliary Systems

Author

Ackerman, N., Albert, J., Auger, M., Auty, D. J., Badhrees, I., Barbeau, P. S., Bartoszek, L., Baussan, E., Belov, V., Benitez-Medina, C., Bhatta, T., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Conley, R., Cook, S., Coon, M., Craddock, W., Craycraft, A., Cree, W., Daniels, T., Darroch, L., Daugherty, S. J., Daughhetee, J., Davis, C. G., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., deVoe, R., Didberidze, T., Dilling, J., Dobi, A., Dolgolenko, A. G., Dolinski, M. J., Dunford, M., Echevers, J., Espic, L., Fairbank Jr., W., 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, E. V., Hargrove, C., Herbst, R., Herrin, S., Hodgson, J., Hughes, M., Iverson, A., Jamil, A., Jessiman, C., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Larson, A., Leonard, D. S., Leonard, F., LePort, F., Li, G. S., Li, S., Li, Z., Licciardi, C., Lin, Y. H., Mackay, D., MacLellan, R., Marino, M., Martin, J. -M., Martin, Y., McElroy, T., McFarlane, K., Michel, T., Mong, B., Moore, D. C., Murray, K., Neilson, R., Njoya, O., Nusair, O., O'Sullivan, K., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Retiere, F., Rivas, A., Robinson, A. L., Rollin, E., Rowson, P. C., Rozo, M. P., Runge, J., Russell, J. J., Schmidt, S., Schubert, A., Sinclair, D., Skarpaas, K., Slutsky, S., Smith, E., Soma, A. K., Stekhanov, V., Strickland, V., Swift, M., Tarka, M., Todd, J., Tolba, T., Tosi, D., Totev, T. I., 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, L. J., Wichoski, U., Wittgen, M., Wodin, J., Wood, J., Wrede, G., Wu, S. X., Xia, Q., Yang, L., Yen, Y. -R., Zeldovich, O. Ya, and Ziegler, T.

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

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., Comment: Manuscript updated in response to JINST reviewer comments

Published
2021
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2. Trace radioactive impurities in final construction materials for EXO-200

Author

Leonard, D. S., Auty, D., Didberidze, T., Gornea, R., Grinberg, P., MacLellan, R., Methven, B., Piepke, A., Vuilleumier, J. -L., Albert, J. B., Anton, G., Badhrees, I., Barbeau, P. S., Bayerlein, R., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Cree, W., Daniels, T., Danilov, M., Daugherty, S. J., Daughhetee, J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Dilling, J., Dolgolenko, A., Dolinski, M. J., Fairbank Jr., W., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Graham, K., Gratta, G., Hall, C., Herrin, S., Hoessl, J., Hufschmidt, P., Hughes, M., Jamil, A., Jewell, M. J., Johnson, A., Johntson, S., Karelin, A., Kaufman, L. J., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., LePort, F., Li, S., Licciardi, C., Lin, Y. H., Mackay, D., Marino, M. G., Michel, T., Mong, B., Moore, D., Murray, K., Neilson, R., Nelson, R., Njoya, O., Odian, A., Ostrovskiy, I., Pocar, A., Pushkin, K., Retière, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Wagenpfeil, M., Waite, A., Walton, J., Walton, T., Wamba, K., Weber, M., Wen, L. J., Wichoski, U., Wodin, J., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Zettlemoyer, J., and Ziegler, T.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We report results from a systematic measurement campaign conducted to identify low radioactivity materials for the construction of the EXO-200 double beta decay experiment. Partial results from this campaign have already been reported in a 2008 paper by the EXO collaboration. Here we release the remaining data, collected since 2007, to the public. The data reported were obtained using a variety of analytic techniques. The measurement sensitivities are among the best in the field. Construction of the EXO-200 detector has been concluded, and Phase-I data was taken from 2011 to 2014. The detector's extremely low background implicitly verifies the measurements and the analysis assumptions made during construction and reported in this paper., Comment: 28 pages, 5 figures

Published
2017
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3. Cosmogenic Backgrounds to 0{\nu}{\beta}{\beta} in EXO-200

Author

Collaboration, EXO-200, Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr, W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Retière, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

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

As neutrinoless double-beta decay experiments become more sensitive and intrinsic radioactivity in detector materials is reduced, previously minor contributions to the background must be understood and eliminated. With this in mind, cosmogenic backgrounds have been studied with the EXO-200 experiment. Using the EXO-200 TPC, the muon flux (through a flat horizontal surface) underground at the Waste Isolation Pilot Plant (WIPP) has been measured to be {\Phi} = 4.07 $\pm$ 0.14 (sys) $\pm$ 0.03 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$, with a vertical intensity of $I_{v}$ = 2.97$^{+0.14}_{-0.13}$ (sys) $\pm$ 0.02 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$ sr$^{-1}$. Simulations of muon-induced backgrounds identified several potential cosmogenic radionuclides, though only 137Xe is a significant background for the 136Xe 0{\nu}{\beta}{\beta} search with EXO-200. Muon-induced neutron backgrounds were measured using {\gamma}-rays from neutron capture on the detector materials. This provided a measurement of 137Xe yield, and a test of the accuracy of the neutron production and transport simulations. The independently measured rates of 136Xe neutron capture and of 137Xe decay agree within uncertainties. Geant4 and FLUKA simulations were performed to estimate neutron capture rates, and these estimates agreed to within ~40% or better with measurements. The ability to identify 136Xe(n,{\gamma}) events will allow for rejection of 137Xe backgrounds in future 0{\nu}{\beta}{\beta} analyses., Comment: Published in JCAP, 29 pages, 13 figures

Published
2015
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4. Investigation of radioactivity-induced backgrounds in EXO-200

Author

Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Belov, V., Benitez-Medina, C., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

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

The search for neutrinoless double-beta decay (0{\nu}{\beta}{\beta}) requires extremely low background and a good understanding of their sources and their influence on the rate in the region of parameter space relevant to the 0{\nu}{\beta}{\beta} signal. We report on studies of various {\beta}- and {\gamma}-backgrounds in the liquid- xenon-based EXO-200 0{\nu}{\beta}{\beta} experiment. With this work we try to better understand the location and strength of specific background sources and compare the conclusions to radioassay results taken before and during detector construction. Finally, we discuss the implications of these studies for EXO-200 as well as for the next-generation, tonne-scale nEXO detector., Comment: 9 pages, 7 figures, 3 tables

Published
2015
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5. Search for Majoron-emitting modes of double-beta decay of $^{136}$Xe with EXO-200

Author

Collaboration, EXO-200, Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Tsang, R., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

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

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on a search for various Majoron-emitting modes based on 100 kg$\cdot$yr exposure of $^{136}$Xe. A lower limit of $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ yr at 90% C.L. on the half-life of the spectral index = 1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of $|< g^{M}_{ee} >|<$ (0.8-1.7)$\cdot$10$^{-5}$., Comment: Published in PRD. Version 2: Referee comments addressed, journal reference added

Published
2014
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6. An apparatus to manipulate and identify individual Ba ions from bulk liquid Xe

Author

Twelker, K., Kravitz, S., Díez, M. Montero, Gratta, G., Fairbank Jr., W., Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Benitez-Medina, C., Breidenbach, M., Brunner, T., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Daugherty, S. J., Davis, C. G., DeVoe, R., Delaquis, S., Didberidze, T., Dilling, J., Dolinski, M. J., Dunford, M., Fabris, L., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Hall, C., Heffner, M., Herrin, S., Hughes, M., Jiang, X. S., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Krücken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Retiere, F., Rowson, P. C., Rozo, M. P., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Vuilleumier, J. -L., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Yang, L., Yen, Y. -R., and Zhao, Y. B.

Subjects
Physics - Instrumentation and Detectors
Abstract

We describe a system to transport and identify barium ions produced in liquid xenon, as part of R&D towards the second phase of a double beta decay experiment, nEXO. The goal is to identify the Ba ion resulting from an extremely rare nuclear decay of the isotope $^{136}$Xe, hence providing a confirmation of the occurrence of the decay. This is achieved through Resonance Ionization Spectroscopy (RIS). In the test setup described here, Ba ions can be produced in liquid xenon or vacuum and collected on a clean substrate. This substrate is then removed to an analysis chamber under vacuum, where laser-induced thermal desorption and RIS are used with time-of-flight (TOF) mass spectroscopy for positive identification of the barium decay product., Comment: 12 pages, 13 figures

Published
2014
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7. Search for Majorana neutrinos with the first two years of EXO-200 data

Author

Collaboration, EXO-200, Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Bonatt, J., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Slutsky, S., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wright, J. D., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Zhao, Y. B.

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

Many extensions of the Standard Model of particle physics suggest that neutrinos should be Majorana-type fermions, but this assumption is difficult to confirm. Observation of neutrinoless double-beta decay ($0\nu \beta \beta$), a spontaneous transition that may occur in several candidate nuclei, would verify the Majorana nature of the neutrino and constrain the absolute scale of the neutrino mass spectrum. Recent searches carried out with $^{76}$Ge (GERDA experiment) and $^{136}$Xe (KamLAND-Zen and EXO-200 experiments) have established the lifetime of this decay to be longer than $10^{25}$ yr, corresponding to a limit on the neutrino mass of 0.2-0.4 eV. Here we report new results from EXO-200 based on 100 kg$\cdot$yr of $^{136}$Xe exposure, representing an almost fourfold increase from our earlier published datasets. We have improved the detector resolution at the $^{136}$Xe double-beta-decay Q-value to $\sigma$/E = 1.53% and revised the data analysis. The obtained half-life sensitivity is $1.9\cdot10^{25}$ yr, an improvement by a factor of 2.7 compared to previous EXO-200 results. We find no statistically significant evidence for $0\nu \beta \beta$ decay and set a half-life limit of $1.1\cdot10^{25}$ yr at 90% CL. The high sensitivity holds promise for further running of the EXO-200 detector and future $0\nu \beta \beta$ decay searches with nEXO., Comment: 9 pages, 6 figures

Published
2014
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8. An improved measurement of the 2\nu \beta \beta\ half-life of Xe-136 with EXO-200

Author

Albert, J. B., Auger, M., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Bonatt, J., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Cook, S., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., Delaquis, S., DeVoe, R., Dobi, A., Dolinski, M. J., Dolgolenko, A., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Fierlinger, P., Franco, D., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Hall, K., Hargrove, C., Herrin, S., Hughes, M., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., MacLellan, R., Marino, M. G., Mong, B., Díez, M. Montero, Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., O'Sullivan, K., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Sabourov, A., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Tarka, M., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wodin, J., Wright, J. D., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Zhao, Y. B.

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

We report on an improved measurement of the 2\nu \beta \beta\ half-life of Xe-136 performed by EXO-200. The use of a large and homogeneous time projection chamber allows for the precise estimate of the fiducial mass used for the measurement, resulting in a small systematic uncertainty. We also discuss in detail the data analysis methods used for double-beta decay searches with EXO-200, while emphasizing those directly related to the present measurement. The Xe-136 2\nu \beta \beta\ half-life is found to be 2.165 +- 0.016 (stat) +- 0.059 (sys) x 10^21 years. This is the most precisely measured half-life of any 2\nu \beta \beta\ decay to date., Comment: 34 pages, 32 figures, Updated to published version

Published
2013
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9. Search for Neutrinoless Double-Beta Decay in $^{136}$Xe with EXO-200

Author

Auger, M., Auty, D. J., Barbeau, P. S., Beauchamp, E., Belov, V., Benitez-Medina, C., Breidenbach, M., Brunner, T., Burenkov, A., Cleveland, B., Cook, S., Daniels, T., Danilov, M., Davis, C. G., Delaquis, S., deVoe, R., Dobi, A., Dolinski, M. J., Dolgolenko, A., Dunford, M., Fairbank Jr., W., Farine, J., Feldmeier, W., Fierlinger, P., Franco, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Hall, K., Hargrove, C., Herrin, S., Hughes, M., Johnson, A., Johnson, T. N., Karelin, A., Kaufman, L. J., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Mackay, D., MacLellan, R., Marino, M., Mong, B., Diez, M. Montero, Muller, A. R., Neilson, R., Nelson, R., Odian, A., Ostrovskiy, I., O'Sullivan, K., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rowson, P. C., Russell, J. J., Sabourov, A., Sinclair, D., Slutsky, S., Stekhanov, V., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, T., Weber, M., Wichoski, U., Wodin, J., Wright, J. D., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

We report on a search for neutrinoless double-beta decay of $^{136}$Xe with EXO-200. No signal is observed for an exposure of 32.5 kg-yr, with a background of ~1.5 x 10^{-3} /(kg yr keV) in the $\pm 1\sigma$ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay $T_{1/2}^{0\nu\beta\beta}$($^{136}$Xe) > 1.6 x 10$^{25}$ yr (90% CL), corresponding to effective Majorana masses of less than 140-380 meV, depending on the matrix element calculation.

Published
2012
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10. The EXO-200 detector, part I: Detector design and construction

Author

Auger, M., Auty, D. J., Barbeau, P. S., Bartoszek, L., Baussan, E., Beauchamp, E., Benitez-Medina, C., Breidenbach, M., Chauhan, D., Cleveland, B., Conley, R., Cook, J., Cook, S., Coppens, A., Craddock, W., Daniels, T., Davis, C. G., Davis, J., deVoe, R., Dobi, A., Dolinski, M. J., Dunford, M., Fairbank Jr, W., Farine, J., Fierlinger, P., Franco, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hagemann, C., Hall, C., Hall, K., Hargrove, C., Herrin, S., Hodgson, J., Hughes, M., Karelin, A., Kaufman, L. J., Kirk, J., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., LePort, F., Mackay, D., MacLellan, R., Marino, M., Merkle, K., Mong, B., Díez, M. Montero, Müller, A. R., Neilson, R., Odian, A., O'Sullivan, K., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rivas, A., Rollin, E., Rowson, P. C., Sabourov, A., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Swift, M., Tosi, D., Twelker, K., Vuilleumier, J. -L., Vuilleumier, J. -M., Walton, T., Weber, M., Wichoski, U., Wodin, J., Wright, J. D., Yang, L., and Yen, Y. -R.

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

EXO-200 is an experiment designed to search for double beta decay of $^{136}$Xe with a single-phase, liquid xenon detector. It uses an active mass of 110 kg of xenon enriched to 80.6% in the isotope 136 in an ultra-low background time projection chamber capable of simultaneous detection of ionization and scintillation. This paper describes the EXO-200 detector with particular attention to the most innovative aspects of the design that revolve around the reduction of backgrounds, the efficient use of the expensive isotopically enriched xenon, and the optimization of the energy resolution in a relatively large volume.

Published
2012
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11. Xenon purity analysis for EXO-200 via mass spectrometry

Author

Dobi, A., Hall, C., Slutsky, S., Yen, Y. -R., Aharmin, B., Auger, M., Barbeau, P. S., Benitez-Medina, C., Breidenbach, M., Cleveland, B., Conley, R., Cook, J., Cook, S., Counts, I., Craddock, W., Daniels, T., Davis, C. G., Davis, J., deVoe, R., Dixit, M., Dolinski, M. J., Donato, K., Fairbank Jr., W., Farine, J., Fierlinger, P., Franco, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Green, C., Hagemann, C., Hall, K., Hallman, D., Hargrove, C., Herrin, S., Hughes, M., Hodgson, J., Juget, F., Karelin, A., Kaufman, L. J., Kuchenkov, A., Kumar, K., Leonard, D. S., Lutter, G., Mackay, D., MacLellan, R., Marino, M., Mong, B., Díez, M. Montero, Morgan, P., Müller, A. R., Neilson, R., Odian, A., O'Sullivan, K., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rivas, A., Rollin, E., Rowson, P. C., Sabourov, A., Sinclair, D., Skarpaas, K., Stekhanov, V., Strickland, V., Swift, M., Twelker, K., Vuilleumier, J. -L., Vuilleumier, J. -M., Weber, M., Wichoski, U., Wodin, J., Wright, J. D., and Yang, L.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We describe purity measurements of the natural and enriched xenon stockpiles used by the EXO-200 double beta decay experiment based on a mass spectrometry technique. The sensitivity of the spectrometer is enhanced by several orders of magnitude by the presence of a liquid nitrogen cold trap, and many impurity species of interest can be detected at the level of one part-per-billion or better. We have used the technique to screen the EXO-200 xenon before, during, and after its use in our detector, and these measurements have proven useful. This is the first application of the cold trap mass spectrometry technique to an operating physics experiment., Comment: 19 pages, 6 figures

Published
2011
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12. Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200

Author

Ackerman, N., Aharmim, B., Auger, M., Auty, D. J., Barbeau, P. S., Barry, K., Bartoszek, L., Beauchamp, E., Belov, V., Benitez-Medina, C., Breidenbach, M., Burenkov, A., Cleveland, B., Conley, R., Conti, E., Cook, J., Cook, S., Coppens, A., Counts, I., Craddock, W., Daniels, T., Danilov, M. V., Davis, C. G., Davis, J., deVoe, R., Djurcic, Z., Dobi, A., Dolgolenko, A. G., Dolinski, M. J., Donato, K., Fairbank Jr., W., Farine, J., Fierlinger, P., Franco, D., Freytag, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Green, M. P., Hagemann, C., Hall, C., Hall, K., Haller, G., Hargrove, C., Herbst, R., Herrin, S., Hodgson, J., Hughes, M., Johnson, A., Karelin, A., Kaufman, L. J., Koffas, T., Kuchenkov, A., Kumar, A., Kumar, K. S., Leonard, D. S., Leonard, F., LePort, F., Mackay, D., MacLellan, R., Marino, M., Martin, Y., Mong, B., Diez, M. Montero, Morgan, P., Muller, A. R., Neilson, R., Nelson, R., Odian, A., O'Sullivan, K., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rivas, A., Rollin, E., Rowson, P. C., Russell, J. J., Sabourov, A., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Swift, M., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Vuilleumier, J. -M., Waite, A., Waldman, S., Walton, T., Wamba, K., Weber, M., Wichoski, U., Wodin, J., Wright, J. D., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

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

We report the observation of two-neutrino double-beta decay in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) +- 0.21 (sys.) x 10^21 yr. This second order process, predicted by the Standard Model, has been observed for several nuclei but not for Xe-136. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrino-less double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.

Published
2011
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13. A xenon gas purity monitor for EXO

Author

EXO Collaboration, Dobi, A., Hall, C., Herrin, S., Odian, A., Prescott, C. Y., Rowson, P. C., Ackerman, N., Aharmin, B., Auger, M., Barbeau, P. S., Barry, K., Benitez-Medina, C., Breidenbach, M., Cook, S., Counts, I., Daniels, T., DeVoe, R., Dolinski, M. J., Donato, K., Fairbank Jr., W., Farine, J., Giroux, G., Gornea, R., Graham, K., Gratta, G., Green, M., Hagemann, C., Hall, K., Hallman, D., Hargrove, C., Karelin, A., Kaufman, L. J., Kuchenkov, A., Kumar, K., Lacey, J., Leonard, D. S., LePort, F., Mackay, D., MacLellan, R., Mong, B., Diez, M. Montero, Muller, A. R., Neilson, R., Niner, E., O'Sullivan, K., Piepke, A., Pocar, A., Pushkin, K., Rollin, E., Sinclair, D., Slutsky, S., Stekhanov, V., Twelker, K., Voskanian, N., Vuilleumier, J. -L., Wichoski, U., Wodin, J., Yang, L., and Yen, Y. -R.

Subjects
Physics - Instrumentation and Detectors
Abstract

We discuss the design, operation, and calibration of two versions of a xenon gas purity monitor (GPM) developed for the EXO double beta decay program. The devices are sensitive to concentrations of oxygen well below 1 ppb at an ambient gas pressure of one atmosphere or more. The theory of operation of the GPM is discussed along with the interactions of oxygen and other impurities with the GPM's tungsten filament. Lab tests and experiences in commissioning the EXO-200 double beta decay experiment are described. These devices can also be used on other noble gases., Comment: 41 pages, 26 figures

Published
2011
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14. A magnetically-driven piston pump for ultra-clean applications

Author

LePort, F., Neilson, R., Barbeau, P. S., Barry, K., Bartoszek, L., Counts, I., Davis, J., deVoe, R., Dolinski, M. J., Gratta, G., Green, M., Díez, M. Montero, Müller, A. R., O'Sullivan, K., Rivas, A., Twelker, K., Aharmim, B., Auger, M., Belov, V., Benitez-Medina, C., Breidenbach, M., Burenkov, A., Cleveland, B., Conley, R., Cook, J., Cook, S., Craddock, W., Daniels, T., Dixit, M., Dobi, A., Donato, K., Fairbank Jr., W., Farine, J., Fierlinger, P., Franco, D., Giroux, G., Gornea, R., Graham, K., Green, C., Hägemann, C., Hall, C., Hall, K., Hallman, D., Hargrove, C., Herrin, S., Hughes, M., Hodgson, J., Juget, F., Kaufman, L. J., Karelin, A., Ku, J., Kuchenkov, A., Kumar, K., Leonard, D. S., Lutter, G., Mackay, D., MacLellan, R., Marino, M., Mong, B., Morgan, P., Odian, A., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rollin, E., Rowson, P. C., Schmoll, B., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Swift, M., Vuilleumier, J. -L., Vuilleumier, J. -M., Wichoski, U., Wodin, J., Yang, L., and Yen, Y. -R.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

A magnetically driven piston pump for xenon gas recirculation is presented. The pump is designed to satisfy extreme purity and containment requirements, as is appropriate for the recirculation of isotopically enriched xenon through the purification system and large liquid xenon TPC of EXO-200. The pump, using sprung polymer gaskets, is capable of pumping more than 16 standard liters per minute (SLPM) of xenon gas with 750 torr differential pressure., Comment: 6 pages, 5 figures

Published
2011
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15. A simple radionuclide-driven single-ion source

Author

Díez, M. Montero, Twelker, K., Fairbank Jr., W., Gratta, G., Barbeau, P. S., Barry, K., DeVoe, R., Dolinski, M. J., Green, M., LePort, F., Müller, A. R., Neilson, R., O'Sullivan, K., Ackerman, N., Aharmin, B., Auger, M., Benitez-Medina, C., Breidenbach, M., Burenkov, A., Cook, S., Daniels, T., Donato, K., Farine, J., Giroux, G., Gornea, R., Graham, K., Hagemann, C., Hall, C., Hall, K., Hallman, D., Hargrove, C., Herrin, S., Karelin, A., Kaufman, L. J., Kuchenkov, A., Kumar, K., Lacey, J., Leonard, D. S., Mackay, D., MacLellan, R., Mong, B., Niner, E., Odian, A., Piepke, A., Pocar, A., Prescott, C. Y., Pushkin, K., Rollin, E., Rowson, P. C., Sinclair, D., Slutsky, S., Stekhanov, V., Vuilleumier, J. -L., Wichoski, U., Wodin, J., Yang, L., and Yen, Y. -R.

Subjects
Physics - Atomic Physics, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

We describe a source capable of producing single barium ions through nuclear recoils in radioactive decay. The source is fabricated by electroplating 148Gd onto a silicon {\alpha}-particle detector and vapor depositing a layer of BaF2 over it. 144Sm recoils from the alpha decay of 148Gd are used to dislodge Ba+ ions from the BaF2 layer and emit them in the surrounding environment. The simultaneous detection of an {\alpha} particle in the substrate detector allows for tagging of the nuclear decay and of the Ba+ emission. The source is simple, durable, and can be manipulated and used in different environments. We discuss the fabrication process, which can be easily adapted to emit most other chemical species, and the performance of the source.

Published
2010
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16. Characterization of large area APDs for the EXO-200 detector

Author

Neilson, R., LePort, F., Pocar, A., Kumar, K., Odian, A., Prescott, C. Y., Tenev, V., Ackerman, N., Akimov, D., Auger, M., Benitez-Medina, C., Breidenbach, M., Burenkov, A., Conley, R., Cook, S., deVoe, R., Dolinski, M. J., Fairbank Jr., W., Farine, J., Fierlinger, P., Flatt, B., Gornea, R., Gratta, G., Green, M., Hall, C., Hall, K., Hallman, D., Hargrove, C., Herrin, S., Hodgson, J., Kaufman, L. J., Kovalenko, A., Leonard, D. S., Mackay, D., Mong, B., Diez, M. Montero, Niner, E., O'Sullivan, K., Piepke, A., Rowson, P. C., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Twelker, K., Vuilleumier, J. -L., Wamba, K., Wichoski, U., Wodin, J., Yang, L., and Yen, Y. -R.

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

EXO-200 uses 468 large area avalanche photodiodes (LAAPDs) for detection of scintillation light in an ultra-low-background liquid xenon (LXe) detector. We describe initial measurements of dark noise, gain and response to xenon scintillation light of LAAPDs at temperatures from room temperature to 169K - the temperature of liquid xenon. We also describe the individual characterization of more than 800 LAAPDs for selective installation in the EXO-200 detector., Comment: 10 pages, 17 figures

Published
2009
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17. The EXO-200 detector, part II: auxiliary systems

Author

Ackerman, N., additional, Albert, J., additional, Auger, M., additional, Auty, D.J., additional, Badhrees, I., additional, Barbeau, P.S., additional, Bartoszek, L., additional, Baussan, E., additional, Belov, V., additional, Benitez-Medina, C., additional, Bhatta, T., additional, Breidenbach, M., additional, Brunner, T., additional, Cao, G.F., additional, Cen, W.R., additional, Chambers, C., additional, Cleveland, B., additional, Conley, R., additional, Cook, S., additional, Coon, M., additional, Craddock, W., additional, Craycraft, A., additional, Cree, W., additional, Daniels, T., additional, Darroch, L., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Davis, C.G., additional, Davis, J., additional, Delaquis, S., additional, Der Mesrobian-Kabakian, A., additional, deVoe, R., additional, Didberidze, T., additional, Dilling, J., additional, Dobi, A., additional, Dolgolenko, A.G., additional, Dolinski, M.J., additional, Dunford, M., additional, Echevers, J., additional, Espic, L., additional, Fairbank, W., additional, Fairbank, D., additional, Farine, J., additional, Feldmeier, W., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fouts, K., additional, Franco, D., additional, Freytag, D., additional, Fudenberg, D., additional, Gautam, P., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Gratta, G., additional, Hagemann, C., additional, Hall, C., additional, Hall, K., additional, Haller, G., additional, Hansen, E.V., additional, Hargrove, C., additional, Herbst, R., additional, Herrin, S., additional, Hodgson, J., additional, Hughes, M., additional, Iverson, A., additional, Jamil, A., additional, Jessiman, C., additional, Jewell, M.J., additional, Johnson, A., additional, Johnson, T.N., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Killick, R., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, Larson, A., additional, Leonard, D.S., additional, Leonard, F., additional, LePort, F., additional, Li, G.S., additional, Li, S., additional, Li, Z., additional, Licciardi, C., additional, Lin, Y.H., additional, Mackay, D., additional, MacLellan, R., additional, Marino, M., additional, Martin, J.-M., additional, Martin, Y., additional, McElroy, T., additional, McFarlane, K., additional, Michel, T., additional, Mong, B., additional, Moore, D.C., additional, Murray, K., additional, Neilson, R., additional, Nelson, R., additional, Njoya, O., additional, Nusair, O., additional, O'Sullivan, K., additional, Odian, A., additional, Ostrovskiy, I., additional, Ouellet, C., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C.Y., additional, Pushkin, K., additional, Retiere, F., additional, Rivas, A., additional, Robinson, A.L., additional, Rollin, E., additional, Rowson, P.C., additional, Rozo, M.P., additional, Runge, J., additional, Russell, J.J., additional, Schmidt, S., additional, Schubert, A., additional, Sinclair, D., additional, Skarpaas, K., additional, Slutsky, S., additional, Smith, E., additional, Soma, A.K., additional, Stekhanov, V., additional, Strickland, V., additional, Swift, M., additional, Tarka, M., additional, Todd, J., additional, Tolba, T., additional, Tosi, D., additional, Totev, T.I., additional, Tsang, R., additional, Twelker, K., additional, Veenstra, B., additional, Veeraraghavan, V., additional, Vuilleumier, J.-L., additional, Vuilleumier, J.-M., additional, Wagenpfeil, M., additional, Waite, A., additional, Walton, J., additional, Walton, T., additional, Wamba, K., additional, Watkins, J., additional, Weber, M., additional, Wen, L.J., additional, Wichoski, U., additional, Wittgen, M., additional, Wodin, J., additional, Wood, J., additional, Wrede, G., additional, Wu, S.X., additional, Xia, Q., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O.Ya., additional, and Ziegler, T., additional

Published
2022
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18. Search for Majorana neutrinos with the first two years of EXO-200 data

Author

Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Bonatt, J., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Jr, Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Slutsky, S., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J.-L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wright, J. D., Yang, L., Yen, Y.-R., Ya. Zeldovich, O., and Zhao, Y. B.

Published
2014
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19. Trace radioactive impurities in final construction materials for EXO-200

Author

Leonard, D.S., primary, Auty, D.J., additional, Didberidze, T., additional, Gornea, R., additional, Grinberg, P., additional, MacLellan, R., additional, Methven, B., additional, Piepke, A., additional, Vuilleumier, J.-L., additional, Albert, J.B., additional, Anton, G., additional, Badhrees, I., additional, Barbeau, P.S., additional, Bayerlein, R., additional, Beck, D., additional, Belov, V., additional, Breidenbach, M., additional, Brunner, T., additional, Cao, G.F., additional, Cen, W.R., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Cree, W., additional, Daniels, T., additional, Danilov, M., additional, Daugherty, S.J., additional, Daughhetee, J., additional, Davis, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Dilling, J., additional, Dolgolenko, A., additional, Dolinski, M.J., additional, Fairbank, W., additional, Farine, J., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fudenberg, D., additional, Graham, K., additional, Gratta, G., additional, Hall, C., additional, Herrin, S., additional, Hoessl, J., additional, Hufschmidt, P., additional, Hughes, M., additional, Jamil, A., additional, Jewell, M.J., additional, Johnson, A., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Lan, Y., additional, LePort, F., additional, Li, S., additional, Licciardi, C., additional, Lin, Y.H., additional, Mackay, D., additional, Marino, M.G., additional, Michel, T., additional, Mong, B., additional, Moore, D., additional, Murray, K., additional, Neilson, R., additional, Nelson, R., additional, Njoya, O., additional, Odian, A., additional, Ostrovskiy, I., additional, Pocar, A., additional, Pushkin, K., additional, Retière, F., additional, Rowson, P.C., additional, Russell, J.J., additional, Schubert, A., additional, Sinclair, D., additional, Smith, E., additional, Stekhanov, V., additional, Tarka, M., additional, Tolba, T., additional, Tsang, R., additional, Wagenpfeil, M., additional, Waite, A., additional, Walton, J., additional, Walton, T., additional, Wamba, K., additional, Weber, M., additional, Wen, L.J., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, Yen, Y.-R., additional, Zeldovich, O.Ya., additional, Zettlemoyer, J., additional, and Ziegler, T., additional

Published
2017
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20. Cosmogenic Backgrounds to 0������ in EXO-200

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beck, D., Belov, V., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Didberidze, T., Dilling, J., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kr��cken, R., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Njoya, O., Nelson, R., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Prescott, C. Y., Reti��re, F., Rowson, P. C., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tsang, R., Twelker, K., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wood, J., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex)
Abstract

As neutrinoless double-beta decay experiments become more sensitive and intrinsic radioactivity in detector materials is reduced, previously minor contributions to the background must be understood and eliminated. With this in mind, cosmogenic backgrounds have been studied with the EXO-200 experiment. Using the EXO-200 TPC, the muon flux (through a flat horizontal surface) underground at the Waste Isolation Pilot Plant (WIPP) has been measured to be �� = 4.07 $\pm$ 0.14 (sys) $\pm$ 0.03 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$, with a vertical intensity of $I_{v}$ = 2.97$^{+0.14}_{-0.13}$ (sys) $\pm$ 0.02 (stat) $\times$ $10^{-7}$cm$^{-2}$ s$^{-1}$ sr$^{-1}$. Simulations of muon-induced backgrounds identified several potential cosmogenic radionuclides, though only 137Xe is a significant background for the 136Xe 0������ search with EXO-200. Muon-induced neutron backgrounds were measured using ��-rays from neutron capture on the detector materials. This provided a measurement of 137Xe yield, and a test of the accuracy of the neutron production and transport simulations. The independently measured rates of 136Xe neutron capture and of 137Xe decay agree within uncertainties. Geant4 and FLUKA simulations were performed to estimate neutron capture rates, and these estimates agreed to within ~40% or better with measurements. The ability to identify 136Xe(n,��) events will allow for rejection of 137Xe backgrounds in future 0������ analyses., Published in JCAP, 29 pages, 13 figures

Published
2015
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21. Search for Majoron-emitting modes of double-beta decay of $^{136}$Xe with EXO-200

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., Ling, J., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Tsang, R., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Yang, L., Yen, Y. -R., and Zeldovich, O. Ya.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on a search for various Majoron-emitting modes based on 100 kg$\cdot$yr exposure of $^{136}$Xe. A lower limit of $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ yr at 90% C.L. on the half-life of the spectral index = 1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of $|< g^{M}_{ee} >, Comment: Published in PRD. Version 2: Referee comments addressed, journal reference added

Published
2014

22. Search for Majorana neutrinos with the first two years of EXO-200 data

Author

200 Collaboration, Albert, J. B., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Bonatt, J., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., DeVoe, R., Delaquis, S., Didberidze, T., Dolgolenko, A., Dolinski, M. J., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Fierlinger, P., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Herrin, S., Hughes, M., Jewell, M. J., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Koffas, T., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., Lin, Y. H., MacLellan, R., Marino, M. G., Mong, B., Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Schubert, A., Sinclair, D., Slutsky, S., Smith, E., Stekhanov, V., Tarka, M., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wright, J. D., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Zhao, Y. B.

Subjects
Physics, Particle physics, Multidisciplinary, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 7. Clean energy, 01 natural sciences, Standard Model, High Energy Physics - Experiment, Nuclear physics, MAJORANA, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Mass spectrum, Limit (mathematics), Neutrino, Nuclear Experiment (nucl-ex), 010306 general physics, Enriched Xenon Observatory, Absolute scale, Nuclear Experiment
Abstract

Many extensions of the Standard Model of particle physics suggest that neutrinos should be Majorana-type fermions, but this assumption is difficult to confirm. Observation of neutrinoless double-beta decay ($0\nu \beta \beta$), a spontaneous transition that may occur in several candidate nuclei, would verify the Majorana nature of the neutrino and constrain the absolute scale of the neutrino mass spectrum. Recent searches carried out with $^{76}$Ge (GERDA experiment) and $^{136}$Xe (KamLAND-Zen and EXO-200 experiments) have established the lifetime of this decay to be longer than $10^{25}$ yr, corresponding to a limit on the neutrino mass of 0.2-0.4 eV. Here we report new results from EXO-200 based on 100 kg$\cdot$yr of $^{136}$Xe exposure, representing an almost fourfold increase from our earlier published datasets. We have improved the detector resolution at the $^{136}$Xe double-beta-decay Q-value to $\sigma$/E = 1.53% and revised the data analysis. The obtained half-life sensitivity is $1.9\cdot10^{25}$ yr, an improvement by a factor of 2.7 compared to previous EXO-200 results. We find no statistically significant evidence for $0\nu \beta \beta$ decay and set a half-life limit of $1.1\cdot10^{25}$ yr at 90% CL. The high sensitivity holds promise for further running of the EXO-200 detector and future $0\nu \beta \beta$ decay searches with nEXO., Comment: 9 pages, 6 figures

Published
2014

23. Cosmogenic backgrounds to 0νββ in EXO-200

Author

Albert, J.B., primary, Auty, D.J., additional, Barbeau, P.S., additional, Beck, D., additional, Belov, V., additional, Breidenbach, M., additional, Brunner, T., additional, Burenkov, A., additional, Cao, G.F., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Daniels, T., additional, Danilov, M., additional, Daugherty, S.J., additional, Davis, J., additional, Delaquis, S., additional, Mesrobian-Kabakian, A. Der, additional, DeVoe, R., additional, Didberidze, T., additional, Dilling, J., additional, Dolgolenko, A., additional, Dolinski, M.J., additional, Dunford, M., additional, Jr., W. Fairbank, additional, Farine, J., additional, Feldmeier, W., additional, Feyzbakhsh, S., additional, Fierlinger, P., additional, Fudenberg, D., additional, Gornea, R., additional, Graham, K., additional, Gratta, G., additional, Hall, C., additional, Herrin, S., additional, Hughes, M., additional, Jewell, M.J., additional, Johnson, A., additional, Johnson, T.N., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L.J., additional, Killick, R., additional, Koffas, T., additional, Kravitz, S., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K.S., additional, Leonard, D.S., additional, Licciardi, C., additional, Lin, Y.H., additional, Ling, J., additional, MacLellan, R., additional, Marino, M.G., additional, Mong, B., additional, Moore, D., additional, Njoya, O., additional, Nelson, R., additional, Odian, A., additional, Ostrovskiy, I., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C.Y., additional, Retière, F., additional, Rowson, P.C., additional, Russell, J.J., additional, Schubert, A., additional, Sinclair, D., additional, Smith, E., additional, Stekhanov, V., additional, Tarka, M., additional, Tolba, T., additional, Tsang, R., additional, Twelker, K., additional, Vuilleumier, J.-L., additional, Waite, A., additional, Walton, J., additional, Walton, T., additional, Weber, M., additional, Wen, L.J., additional, Wichoski, U., additional, Wood, J., additional, Yang, L., additional, Yen, Y.-R., additional, and Zeldovich, O.Ya., additional

Published
2016
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24. An improved measurement of the 2������ half-life of Xe-136 with EXO-200

Author

Albert, J. B., Auger, M., Auty, D. J., Barbeau, P. S., Beauchamp, E., Beck, D., Belov, V., Benitez-Medina, C., Bonatt, J., Breidenbach, M., Brunner, T., Burenkov, A., Cao, G. F., Chambers, C., Chaves, J., Cleveland, B., Cook, S., Daniels, T., Danilov, M., Daugherty, S. J., Davis, C. G., Davis, J., Delaquis, S., DeVoe, R., Dobi, A., Dolinski, M. J., Dolgolenko, A., Dunford, M., Fairbank, W., Farine, J., Feldmeier, W., Fierlinger, P., Franco, D., Fudenberg, D., Giroux, G., Gornea, R., Graham, K., Gratta, G., Hall, C., Hall, K., Hargrove, C., Herrin, S., Hughes, M., Jiang, X. S., Johnson, A., Johnson, T. N., Johnston, S., Karelin, A., Kaufman, L. J., Killick, R., Kravitz, S., Kuchenkov, A., Kumar, K. S., Leonard, D. S., Leonard, F., Licciardi, C., MacLellan, R., Marino, M. G., Mong, B., D��ez, M. Montero, Moore, D., Nelson, R., Odian, A., Ostrovskiy, I., O'Sullivan, K., Ouellet, C., Piepke, A., Pocar, A., Prescott, C. Y., Rivas, A., Rowson, P. C., Rozo, M. P., Russell, J. J., Sabourov, A., Sinclair, D., Skarpaas, K., Slutsky, S., Stekhanov, V., Strickland, V., Tarka, M., Tolba, T., Tosi, D., Twelker, K., Vogel, P., Vuilleumier, J. -L., Waite, A., Walton, J., Walton, T., Weber, M., Wen, L. J., Wichoski, U., Wodin, J., Wright, J. D., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., and Zhao, Y. B.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex)
Abstract

We report on an improved measurement of the 2������ half-life of Xe-136 performed by EXO-200. The use of a large and homogeneous time projection chamber allows for the precise estimate of the fiducial mass used for the measurement, resulting in a small systematic uncertainty. We also discuss in detail the data analysis methods used for double-beta decay searches with EXO-200, while emphasizing those directly related to the present measurement. The Xe-136 2������ half-life is found to be 2.165 +- 0.016 (stat) +- 0.059 (sys) x 10^21 years. This is the most precisely measured half-life of any 2������ decay to date., 34 pages, 32 figures, Updated to published version

Published
2013
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25. An apparatus to manipulate and identify individual Ba ions from bulk liquid Xe

Author

Twelker, K., primary, Kravitz, S., additional, Díez, M. Montero, additional, Gratta, G., additional, Fairbank, W., additional, Albert, J. B., additional, Auty, D. J., additional, Barbeau, P. S., additional, Beck, D., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Brunner, T., additional, Cao, G. F., additional, Chambers, C., additional, Cleveland, B., additional, Coon, M., additional, Craycraft, A., additional, Daniels, T., additional, Daugherty, S. J., additional, Davis, C. G., additional, DeVoe, R., additional, Delaquis, S., additional, Didberidze, T., additional, Dilling, J., additional, Dolinski, M. J., additional, Dunford, M., additional, Fabris, L., additional, Farine, J., additional, Feldmeier, W., additional, Fierlinger, P., additional, Fudenberg, D., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Hall, C., additional, Heffner, M., additional, Herrin, S., additional, Hughes, M., additional, Jiang, X. S., additional, Johnson, T. N., additional, Johnston, S., additional, Karelin, A., additional, Kaufman, L. J., additional, Killick, R., additional, Koffas, T., additional, Krücken, R., additional, Kuchenkov, A., additional, Kumar, K. S., additional, Leonard, D. S., additional, Leonard, F., additional, Licciardi, C., additional, Lin, Y. H., additional, MacLellan, R., additional, Marino, M. G., additional, Mong, B., additional, Moore, D., additional, Odian, A., additional, Ostrovskiy, I., additional, Ouellet, C., additional, Piepke, A., additional, Pocar, A., additional, Retiere, F., additional, Rowson, P. C., additional, Rozo, M. P., additional, Schubert, A., additional, Sinclair, D., additional, Smith, E., additional, Stekhanov, V., additional, Tarka, M., additional, Tolba, T., additional, Tosi, D., additional, Vuilleumier, J.-L., additional, Walton, J., additional, Walton, T., additional, Weber, M., additional, Wen, L. J., additional, Wichoski, U., additional, Yang, L., additional, Yen, Y.-R., additional, and Zhao, Y. B., additional

Published
2014
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26. The EXO-200 detector, part I: detector design and construction

Author

Auger, M, primary, Auty, D J, additional, Barbeau, P S, additional, Bartoszek, L, additional, Baussan, E, additional, Beauchamp, E, additional, Benitez-Medina, C, additional, Breidenbach, M, additional, Chauhan, D, additional, Cleveland, B, additional, Conley, R, additional, Cook, J, additional, Cook, S, additional, Coppens, A, additional, Craddock, W, additional, Daniels, T, additional, Davis, C G, additional, Davis, J, additional, deVoe, R, additional, Dobi, A, additional, Dolinski, M J, additional, Dunford, M, additional, Fairbank, W, additional, Farine, J, additional, Fierlinger, P, additional, Franco, D, additional, Giroux, G, additional, Gornea, R, additional, Graham, K, additional, Gratta, G, additional, Hagemann, C, additional, Hall, C, additional, Hall, K, additional, Hargrove, C, additional, Herrin, S, additional, Hodgson, J, additional, Hughes, M, additional, Karelin, A, additional, Kaufman, L J, additional, Kirk, J, additional, Kuchenkov, A, additional, Kumar, K S, additional, Leonard, D S, additional, Leonard, F, additional, LePort, F, additional, Mackay, D, additional, MacLellan, R, additional, Marino, M, additional, Merkle, K, additional, Mong, B, additional, Díez, M Montero, additional, Müller, A R, additional, Neilson, R, additional, Odian, A, additional, O'Sullivan, K, additional, Ouellet, C, additional, Piepke, A, additional, Pocar, A, additional, Prescott, C Y, additional, Pushkin, K, additional, Rivas, A, additional, Rollin, E, additional, Rowson, P C, additional, Sabourov, A, additional, Sinclair, D, additional, Skarpaas, K, additional, Slutsky, S, additional, Stekhanov, V, additional, Strickland, V, additional, Swift, M, additional, Tosi, D, additional, Twelker, K, additional, Vuilleumier, J -L, additional, Vuilleumier, J -M, additional, Walton, T, additional, Weber, M, additional, Wichoski, U, additional, Wodin, J, additional, Wright, J D, additional, Yang, L, additional, and Yen, Y -R, additional

Published
2012
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27. Xenon purity analysis for EXO-200 via mass spectrometry

Author

Dobi, A., primary, Hall, C., additional, Slutsky, S., additional, Yen, Y.-R., additional, Aharmin, B., additional, Auger, M., additional, Barbeau, P.S., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Cleveland, B., additional, Conley, R., additional, Cook, J., additional, Cook, S., additional, Counts, I., additional, Craddock, W., additional, Daniels, T., additional, Davis, C.G., additional, Davis, J., additional, deVoe, R., additional, Dixit, M., additional, Dolinski, M.J., additional, Donato, K., additional, Fairbank, W., additional, Farine, J., additional, Fierlinger, P., additional, Franco, D., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Gratta, G., additional, Green, C., additional, Hagemann, C., additional, Hall, K., additional, Hallman, D., additional, Hargrove, C., additional, Herrin, S., additional, Hughes, M., additional, Hodgson, J., additional, Juget, F., additional, Karelin, A., additional, Kaufman, L.J., additional, Kuchenkov, A., additional, Kumar, K., additional, Leonard, D.S., additional, Lutter, G., additional, Mackay, D., additional, MacLellan, R., additional, Marino, M., additional, Mong, B., additional, Montero Díez, M., additional, Morgan, P., additional, Müller, A.R., additional, Neilson, R., additional, Odian, A., additional, O'Sullivan, K., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C.Y., additional, Pushkin, K., additional, Rivas, A., additional, Rollin, E., additional, Rowson, P.C., additional, Sabourov, A., additional, Sinclair, D., additional, Skarpaas, K., additional, Stekhanov, V., additional, Strickland, V., additional, Swift, M., additional, Twelker, K., additional, Vuilleumier, J.-L., additional, Vuilleumier, J.-M., additional, Weber, M., additional, Wichoski, U., additional, Wodin, J., additional, Wright, J.D., additional, and Yang, L., additional

Published
2012
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28. First-ever high-performance, low-power 32-bit microcontrollers with embedded nanocrystal flash and enhanced EEPROM memories

Author

Yater, Jane, primary, Kang, S.-T., additional, Hong, C. M., additional, Min, B., additional, Kolar, D., additional, Loiko, K., additional, Shen, J., additional, Winstead, B., additional, Gasquet, H., additional, Mohammed, S., additional, Hardell, A., additional, Malloch, W., additional, Cook, B., additional, Syzdek, R., additional, Jarrar, A., additional, Feddeler, J., additional, Baker, K., additional, Chang, K.M., additional, Herrin, S., additional, Parks, R., additional, and Chindalore, G., additional

Published
2012
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30. A xenon gas purity monitor for EXO

Author

Dobi, A., primary, Hall, C., additional, Herrin, S., additional, Odian, A., additional, Prescott, C.Y., additional, Rowson, P.C., additional, Ackerman, N., additional, Aharmin, B., additional, Auger, M., additional, Barbeau, P.S., additional, Barry, K., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Cook, S., additional, Counts, I., additional, Daniels, T., additional, DeVoe, R., additional, Dolinski, M.J., additional, Donato, K., additional, Fairbank, W., additional, Farine, J., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Gratta, G., additional, Green, M., additional, Hagemann, C., additional, Hall, K., additional, Hallman, D., additional, Hargrove, C., additional, Karelin, A., additional, Kaufman, L.J., additional, Kuchenkov, A., additional, Kumar, K., additional, Lacey, J., additional, Leonard, D.S., additional, LePort, F., additional, Mackay, D., additional, MacLellan, R., additional, Mong, B., additional, Montero Díez, M., additional, Müller, A.R., additional, Neilson, R., additional, Niner, E., additional, O'Sullivan, K., additional, Piepke, A., additional, Pocar, A., additional, Pushkin, K., additional, Rollin, E., additional, Sinclair, D., additional, Slutsky, S., additional, Stekhanov, V., additional, Twelker, K., additional, Voskanian, N., additional, Vuilleumier, J.-L., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, and Yen, Y.-R., additional

Published
2011
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31. A magnetically driven piston pump for ultra-clean applications

Author

LePort, F., primary, Neilson, R., additional, Barbeau, P. S., additional, Barry, K., additional, Bartoszek, L., additional, Counts, I., additional, Davis, J., additional, deVoe, R., additional, Dolinski, M. J., additional, Gratta, G., additional, Green, M., additional, Díez, M. Montero, additional, Müller, A. R., additional, O’Sullivan, K., additional, Rivas, A., additional, Twelker, K., additional, Aharmim, B., additional, Auger, M., additional, Belov, V., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Burenkov, A., additional, Cleveland, B., additional, Conley, R., additional, Cook, J., additional, Cook, S., additional, Craddock, W., additional, Daniels, T., additional, Dixit, M., additional, Dobi, A., additional, Donato, K., additional, Fairbank, W., additional, Farine, J., additional, Fierlinger, P., additional, Franco, D., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Green, C., additional, Hägemann, C., additional, Hall, C., additional, Hall, K., additional, Hallman, D., additional, Hargrove, C., additional, Herrin, S., additional, Hughes, M., additional, Hodgson, J., additional, Juget, F., additional, Kaufman, L. J., additional, Karelin, A., additional, Ku, J., additional, Kuchenkov, A., additional, Kumar, K., additional, Leonard, D. S., additional, Lutter, G., additional, Mackay, D., additional, MacLellan, R., additional, Marino, M., additional, Mong, B., additional, Morgan, P., additional, Odian, A., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C. Y., additional, Pushkin, K., additional, Rollin, E., additional, Rowson, P. C., additional, Schmoll, B., additional, Sinclair, D., additional, Skarpaas, K., additional, Slutsky, S., additional, Stekhanov, V., additional, Strickland, V., additional, Swift, M., additional, Vuilleumier, J.-L., additional, Vuilleumier, J.-M., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, and Yen, Y.-R., additional

Published
2011
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32. Prospects for Barium Tagging in Gaseous Xenon

Author

Sinclair, D, primary, Rollin, E, additional, Smith, J, additional, Mommers, A, additional, Ackeran, N, additional, Aharmin, B, additional, Auger, M, additional, Barbeau, P S, additional, Benitez-Medina, C, additional, Breidenbach, M, additional, Burenkov, A, additional, Cook, S, additional, Coppens, A, additional, Daniels, T, additional, DeVoe, R, additional, Dobi, A, additional, Dolinski, M J, additional, Donato, K, additional, Fairbank, W, additional, Farine, J, additional, Giroux, G, additional, Gornea, G, additional, Graham, K, additional, Gratta, G, additional, Green, M, additional, Hagemann, C, additional, Hall, C, additional, Hall, K, additional, Hallman, D, additional, Hargrove, C, additional, Herrin, S, additional, Kaufman, L K, additional, Leonard, D S, additional, LePort, F, additional, Mackay, D, additional, MacLennan, R, additional, Mong, B, additional, Díez, M Montero, additional, Müller, A R, additional, Neilson, R, additional, Niner, E, additional, Odian, A, additional, O'Sullivan, K, additional, Ouellet, C, additional, Piepke, A, additional, Pocar, A, additional, Prescott, C Y, additional, Pushkin, K, additional, Rowson, P C, additional, Slutsky, S, additional, Stekhanov, V, additional, Twelker, K, additional, Voskanian, N, additional, Vuilleumier, J -L, additional, Wichoski, U, additional, Wodin, J, additional, Yang, L, additional, and Yen, Y -R, additional

Published
2011
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33. A simple radionuclide-driven single-ion source

Author

Montero Díez, M., primary, Twelker, K., additional, Fairbank, W., additional, Gratta, G., additional, Barbeau, P. S., additional, Barry, K., additional, DeVoe, R., additional, Dolinski, M. J., additional, Green, M., additional, LePort, F., additional, Müller, A. R., additional, Neilson, R., additional, O’Sullivan, K., additional, Ackerman, N., additional, Aharmin, B., additional, Auger, M., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Burenkov, A., additional, Cook, S., additional, Daniels, T., additional, Donato, K., additional, Farine, J., additional, Giroux, G., additional, Gornea, R., additional, Graham, K., additional, Hagemann, C., additional, Hall, C., additional, Hall, K., additional, Hallman, D., additional, Hargrove, C., additional, Herrin, S., additional, Karelin, A., additional, Kaufman, L. J., additional, Kuchenkov, A., additional, Kumar, K., additional, Lacey, J., additional, Leonard, D. S., additional, Mackay, D., additional, MacLellan, R., additional, Mong, B., additional, Niner, E., additional, Odian, A., additional, Piepke, A., additional, Pocar, A., additional, Prescott, C. Y., additional, Pushkin, K., additional, Rollin, E., additional, Rowson, P. C., additional, Sinclair, D., additional, Slutsky, S., additional, Stekhanov, V., additional, Vuilleumier, J.-L., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, and Yen, Y.-R., additional

Published
2010
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34. Characterization of large area APDs for the EXO-200 detector

Author

Neilson, R., primary, LePort, F., additional, Pocar, A., additional, Kumar, K.S., additional, Odian, A., additional, Prescott, C.Y., additional, Tenev, V., additional, Ackerman, N., additional, Akimov, D., additional, Auger, M., additional, Benitez-Medina, C., additional, Breidenbach, M., additional, Burenkov, A., additional, Conley, R., additional, Cook, S., additional, deVoe, R., additional, Dolinski, M.J., additional, Fairbank Jr., W., additional, Farine, J., additional, Fierlinger, P., additional, Flatt, B., additional, Gornea, R., additional, Gratta, G., additional, Green, M., additional, Hall, C., additional, Hall, K., additional, Hallman, D., additional, Hargrove, C., additional, Herrin, S., additional, Hodgson, J., additional, Kaufman, L.J., additional, Kovalenko, A., additional, Leonard, D.S., additional, Mackay, D., additional, Mong, B., additional, Montero Diez, M., additional, Niner, E., additional, O’Sullivan, K., additional, Piepke, A., additional, Rowson, P.C., additional, Sinclair, D., additional, Skarpaas, K., additional, Slutsky, S., additional, Stekhanov, V., additional, Strickland, V., additional, Twelker, K., additional, Vuilleumier, J.-L., additional, Wamba, K., additional, Wichoski, U., additional, Wodin, J., additional, Yang, L., additional, and Yen, Y.-R., additional

Published
2009
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37. Intractable hiccups treated with amitriptyline

Author

Dewitt J, Warren, Woodward-Smith Ma, Herrin S, and Peabody Ca

Subjects
Psychiatry and Mental health, Intractable hiccups, business.industry, Anesthesia, Medicine, Amitriptyline, business, medicine.drug
Published
1988

38. Intractable hiccups treated with amitriptyline.

Author

Peabody, Cecilia A., Dewitt, John, Herrin, Steve, Woodward-Smith, Mary Ann, Warner, Dhyanne, Peabody, C A, Dewitt, J, Herrin, S, Woodward-Smith, M A, and Warren, M D

Subjects
LETTERS to the editor, HICCUPS, THERAPEUTICS, AMITRIPTYLINE
Abstract

A letter to the editor "Intractable Hiccups Treated With Amitriptyline" is presented.

Published
1988
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39. Using Photovoice to Stimulate Reflection and Collaboration in Health Professions Students Through an Interprofessional Education Activity.

Author

Herrin S, Sawyer K, Trad M, and Gibbs K

Subjects
Humans, Female, Male, Attitude of Health Personnel, Health Occupations education, Adult, Cooperative Behavior, Interprofessional Education organization & administration, Interprofessional Relations, Students, Health Occupations psychology, Photography
Abstract

Objective: Today's healthcare system requires interprofessional collaborative practice (IPCP) to improve health outcomes. IPCP often begins with interprofessional education (IPE), which should stimulate meaningful idea exchange. This study's purpose was to assess the impact of a photovoice-based IPE experience on the attitudes and beliefs of students in two health professions programs., Methods: Forty-two Doctor of Physical Therapy students and 13 Radiation Therapy students created photovoice slides representing the most significant "thing" in their professional education. Students discussed their slides in small groups followed by a large-group discussion. A pretest-posttest survey containing researcher-generated questions and the Student Perceptions of Interprofessional Clinical Education-Revised (SPICE-R2) and a post-activity evaluation were administered., Results: Forty-two students completed the pretest survey; 35 completed the posttest survey. A statistically significant difference was found between pretest (M=4.07, SD=0.91) and posttest (M=4.45, SD=0.70) SPICE-R2 total scores, t(928)=7.22, p<0.001. Statistically significant differences were found for all SPICE-R2 factor scores. Thematic analysis revealed three themes: 1) students learned about the other profession, 2) the IPE experience was meaningful, and 3) the IPE experience could be improved., Conclusions: The photovoice IPE experience stimulated student reflection, interprofessional collaboration, and new perceptions about the other health profession. Future studies should focus on similar activities offered earlier in the education program.

Published
2024

40. Tensor fasciae suralis - Prevalence study and literature review.

Author

Bale LSW, Damjanovic MM, Damjanovic IG, DiMaio NM, and Herrin SO

Subjects
Humans, Male, Female, Prevalence, Muscle, Skeletal anatomy & histology, Muscle, Skeletal diagnostic imaging, Aged, Anatomic Variation, Lower Extremity diagnostic imaging, Lower Extremity anatomy & histology, Aged, 80 and over, Middle Aged, Cadaver
Abstract

Tensor fasciae suralis (TFS) is an accessory muscle of the posterior lower extremity. Although TFS has been documented in cadaveric and radiological reports, its prevalence remains unknown. The TFS variant is noteworthy to anatomists, as it may be encountered in the dissection laboratory, and clinicians, as the muscle could potentially cause confusion during physical examination or diagnostic imaging. Multiple variations of TFS have been reported in the literature, suggesting the need for a classification system. We dissected 236 formalin-fixed cadaveric lower limbs to determine the prevalence of TFS. The PubMed and MEDLINE databases were searched to compare the anatomical features of independent TFS case reports. In our prevalence study, the TFS muscle was identified in three lower limbs (1.3%). In total, 38 cases of TFS (32 cadaveric and six radiological) were identified in the literature. Our literature review revealed that the accessory muscle most often arises as a single head from the long head of the biceps femoris, yet many other presentations have been documented. The need for a classification system to distinguish between the subtypes of TFS became apparent during the literature review. Tensor fasciae suralis is a rare muscle, present in only 3 of 236 (1.3%) cadaveric lower limbs dissected in this study. We propose the use of a classification system, based on muscle origin and number of heads, to better organize the subtypes of TFS., (Copyright © 2024 The Author(s). Published by Elsevier Masson SAS.. All rights reserved.)

Published
2024
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41. Examining Relationships Among Leadership Behaviors, Demographic and Program Factors, and Resilience in Physical Therapy Professional Education Program Directors.

Author

Herrin S

Subjects
Humans, Male, Female, Adult, Middle Aged, Leadership, Demography, Resilience, Psychological, Education, Professional, Psychological Tests
Abstract

Introduction: Physical therapy professional education program directors (PDs) face stress associated with work roles and responsibilities, which can cause burnout and job turnover., Review of Literature: Burnout and turnover in physical therapy education PD positions are influenced by inexperience, insufficient compensation, decreased support, heavy workloads, difficulty hiring and retaining faculty, and internal conflict. Program directors also receive insufficient training in their roles. Individuals with greater resilience, or the ability to face adversity with positive outcomes, may be more resistant to stress, burnout, and turnover. Therefore, this study's purpose was to explore the relationships among leadership behaviors, demographic and program factors, and resilience in physical therapy PDs., Subjects: Of the 600 physical therapy PDs invited to participate in the study, 126 directors completed the survey (21% response rate)., Methods: The survey included demographic questions, the Multifactor Leadership Questionnaire (MLQ-5X), and the 10-item Connor-Davidson Resilience Scale (CD-RISC-10). Correlational analyses were used to investigate relationships among leadership behaviors, demographic and program factors, and resilience., Results: Participants included 43 physical therapist and 82 physical therapist assistant PDs (79.4% female and 20.6% male participants; mean age, 52.0 ± 8.3 years; mean years in role, 7.3 ± 6.9 years). Mean MLQ-5X scores showed that participants primarily used transformational leadership (TFL) behaviors. The mean CD-RISC-10 score for participants was 33.06 (±4.10). Analysis revealed statistically significant positive relationships between all TFL behaviors and resilience. Exploratory regression analysis revealed that 3 leadership behaviors and one demographic factor may contribute to resilience in participants, although the proportion of variance was modest (39%)., Discussion and Conclusion: This is the first study to offer insight regarding the relationships between leadership behaviors and resilience in physical therapy PDs. These results may help lay the foundation for future research in this area, with the goal of decreasing burnout and job turnover through increased resilience., Competing Interests: The author declares no conflicts of interest., (Copyright © 2023 Academy of Physical Therapy Education, APTA.)

Published
2023
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43. Chiropractic interns' perceptions of stress and confidence.

Author

Spegman AM and Herrin S

Abstract

Objective: Psychological stress has been shown to influence learning and performance among medical and graduate students. Few studies have examined psychological stress in chiropractic students and interns. This preliminary study explored interns' perceptions around stress and confidence at the midpoint of professional training., Methods: This pilot study used a mixed-methods approach, combining rating scales and modified qualitative methods, to explore interns' lived experience. Eighty-eight interns provided ratings of stress and confidence and narrative responses to broad questions., Results: Participants reported multiple sources of stress; stress and confidence ratings were inversely related. Interns described stress as forced priorities, inadequate time, and perceptions of weak performance. Two themes, "convey respect" and "guide real-world learning," describe faculty actions that minimized stress and promoted confidence., Conclusion: Chiropractic interns experience varying degrees of stress, which is managed with diverse strategies. The development of confidence appears to be influenced by the consistency and manner in which feedback is provided. Although faculty cannot control the amount or sources of stress, awareness of interns' perceptions can strengthen our effectiveness as educators.

Published
2007
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44. Conservative treatment of calcific trochanteric bursitis.

Author

Gerber JM and Herrin SO

Subjects
Bursitis diagnostic imaging, Bursitis pathology, Calcinosis diagnostic imaging, Calcinosis therapy, Electric Stimulation Therapy, Female, Humans, Massage, Middle Aged, Radiography, Ultrasonic Therapy, Bursitis therapy, Chiropractic methods, Hip Joint diagnostic imaging
Abstract

Objective: To present a case of conservatively managed calcific trochanteric bursitis and discuss differential diagnosis and treatment alternatives., Clinical Features: A 53-yr-old obese female presented with acute severe lateral hip and posterolateral thigh pain. Examination findings were consistent with trochanteric bursitis and radiographs demonstrated calcific infiltration of the trochanteric bursa., Intervention and Outcome: An intensive 2-wk course of pulsed ultrasound, ice massage, interferential current and chiropractic lumbopelvic manipulation resulted in symptomatic relief, abolishment of palpatory tenderness and return of pain-free passive and resisted range of motion of the hip., Conclusions: Trochanteric bursitis is a common cause of hip pain. A trial of conservative measures is warranted for this condition, even when calcinosis is present, before more invasive therapies are considered.

Published
1994

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