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1. Projected sensitivity of the LUX-ZEPLIN experiment to the 0νββ decay of Xe136

Author

Richard Rosero, D. R. Tronstad, David Leonard, X. Bai, J. Johnson, X. Liu, J. Busenitz, P. Brás, C. Rhyne, A. Cole, R. J. Gaitskell, R. Linehan, Eli Gibson, C. Levy, Sergey Burdin, R. C. Webb, A. Baxter, L. de Viveiros, A. Alqahtani, A. Monte, C. Ghag, N. Angelides, P. Sorensen, S. Gokhale, S. Shaw, Catarina Silva, J. Palmer, B. Lopez Paredes, T. J. Sumner, N. Marangou, A. Manalaysay, K. E. Boast, O. Jahangir, R. W. Schnee, S. Pal, M. E. Monzani, Yue Meng, D. Naim, I. Stancu, J. Liao, J. J. Wang, K. O’Sullivan, V. Bugaev, N. I. Chott, A. Khazov, P. Zarzhitsky, B. J. Mount, T. A. Shutt, Matthew Szydagis, J. Lin, H. N. Nelson, K. C. Oliver-Mallory, Wolfgang Lorenzon, Ross G. White, J.J. Silk, J. R. Bensinger, E. Leason, Benjamin Krikler, M. G. D. Gilchriese, E. Druszkiewicz, Laura Manenti, J. E. Y. Dobson, C. Carels, E. Mizrachi, C. Chan, Henrique Araujo, J. A. Morad, L. Kreczko, J. R. Watson, F.-T. Liao, A. Vaitkus, S. Kravitz, W. C. Taylor, P. Rossiter, H. J. Birch, D. Khaitan, K. Stifter, A. Kamaha, J. Bang, J. A. Nikoleyczik, D. Seymour, W. Turner, U. Utku, E. D. Fraser, Mani Tripathi, K. T. Lesko, C. Nedlik, A. Biekert, J. Balajthy, V. A. Kudryavtsev, S. Fiorucci, A. C. Kaboth, J. McLaughlin, C. M. Ignarra, C. R. Hall, F. L. H. Wolfs, R. Cabrita, Kareem Kazkaz, G. Rutherford, D. R. Tiedt, A. Harrison, M. Horn, J. Li, T. P. Biesiadzinski, C. D. Kocher, M. G. D. van der Grinten, K. J. Palladino, M. F. Marzioni, M. C. Carmona-Benitez, J. Kras, Michele Cascella, Carl W. Akerlof, H. Kraus, C. E. Dahl, T. Fruth, T. J. Anderson, A. Lindote, J. M. Lyle, Jilei Xu, B. Boxer, C. Nehrkorn, A. B.M.R. Sazzad, A. Tomás, E. K. Pease, Juhyeong Lee, Michael Schubnell, D. S. Akerib, L. Korley, K. Kamdin, S. Balashov, Ethan Bernard, P. Majewski, W. H. Lippincott, V. N. Solovov, X. Xiang, Daniel McKinsey, N. Parveen, Minfang Yeh, A. St. J. Murphy, M. Solmaz, Adam Bernstein, Robert A. Taylor, E. Morrison, D. Woodward, A. Naylor, T. J. Whitis, S. J. Haselschwardt, D. Q. Huang, M.I. Lopes, N. Swanson, W. Wang, P. A. Terman, S. R. Eriksen, R. L. Mannino, Antonin Vacheret, M. Arthurs, S. Luitz, G. Pereira, Richard J. Smith, T. K. Edberg, Q. Riffard, D. Temples, K. Pushkin, J. E. Armstrong, J. H. Buckley, J. Genovesi, M. Tan, E. H. Miller, A. Cottle, I. Olcina, A. Bhatti, S. A. Hertel, C. Loniewski, Elena Korolkova, A. Stevens, G. R. C. Rischbieter, F. Neves, Bjoern Penning, M. Timalsina, L. Tvrznikova, Henning Flaecher, S. Alsum, I. Khurana, J. Y.K. Hor, J. E. Cutter, J. Reichenbacher, W. Ji, A. Fan, Duncan Carlsmith, D. Santone, A. Nilima, and R. Liu

Subjects
Physics, 010308 nuclear & particles physics, Active volume, 0103 physical sciences, Analytical chemistry, 010306 general physics, 01 natural sciences, Sensitivity (electronics)
Abstract

Author(s): Akerib, DS; Akerlof, CW; Alqahtani, A; Alsum, SK; Anderson, TJ; Angelides, N; Araujo, HM; Armstrong, JE; Arthurs, M; Bai, X; Balajthy, J; Balashov, S; Bang, J; Baxter, A; Bensinger, J; Bernard, EP; Bernstein, A; Bhatti, A; Biekert, A; Biesiadzinski, TP; Birch, HJ; Boast, KE; Boxer, B; Bras, P; Buckley, JH; Bugaev, VV; Burdin, S; Busenitz, JK; Cabrita, R; Carels, C; Carlsmith, DL; Carmona-Benitez, MC; Cascella, M; Chan, C; Chott, NI; Cole, A; Cottle, A; Cutter, JE; Dahl, CE; De Viveiros, L; Dobson, JEY; Druszkiewicz, E; Edberg, TK; Eriksen, SR; Fan, A; Fiorucci, S; Flaecher, H; Fraser, ED; Fruth, T; Gaitskell, RJ; Genovesi, J; Ghag, C; Gibson, E; Gilchriese, MGD; Gokhale, S; Van Der Grinten, MGD; Hall, CR; Harrison, A; Haselschwardt, SJ; Hertel, SA; Hor, JYK; Horn, M; Huang, DQ; Ignarra, CM; Jahangir, O; Ji, W; Johnson, J; Kaboth, AC; Kamaha, AC; Kamdin, K; Kazkaz, K; Khaitan, D; Khazov, A; Khurana, I; Kocher, CD; Korley, L; Korolkova, EV; Kras, J; Kraus, H; Kravitz, S; Kreczko, L; Krikler, B; Kudryavtsev, VA; Leason, EA; Lee, J | Abstract: The LUX-ZEPLIN (LZ) experiment will enable a neutrinoless double β decay search in parallel to the main science goal of discovering dark matter particle interactions. We report the expected LZ sensitivity to Xe136 neutrinoless double β decay, taking advantage of the significant (g600 kg) Xe136 mass contained within the active volume of LZ without isotopic enrichment. After 1000 live-days, the median exclusion sensitivity to the half-life of Xe136 is projected to be 1.06×1026 years (90% confidence level), similar to existing constraints. We also report the expected sensitivity of a possible subsequent dedicated exposure using 90% enrichment with Xe136 at 1.06×1027 years.

Published
2020
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2. Search for2νββdecay ofXe136to the01+excited state ofBa136with the EXO-200 liquid xenon detector

Author

A.C. Odian, I. Ostrovskiy, David Leonard, Thomas Koffas, W. M. Fairbank, O. Ya. Zeldovich, S. Feyzbakhsh, E. Smith, R. Krücken, D. Beck, M. Coon, D. Fudenberg, T. Brunner, J. King, O. Njoya, R. DeVoe, Peter Fierlinger, Justin Albert, K. Graham, Monica Dunford, A. Pocar, R. H. Nelson, U. Wichoski, M. Weber, T. Walton, Petr Vogel, M. Tarka, C. Licciardi, C. R. Hall, T. Tolba, C. Chambers, Q. Y. Xu, Ryan Killick, R. Tsang, M. Danilov, J. Walton, P. C. Rowson, D. J. Auty, A. Kuchenkov, Jens Dilling, J. Chaves, W. Feldmeier, F. Retiere, B. Mong, C.Y. Prescott, A. Craycraft, Martin Breidenbach, S. J. Daugherty, R. Gornea, L. J. Kaufman, T. Daniels, M. Hughes, J. Farine, S. Delaquis, A. P. Waite, Simon Johnston, J. C. Davis, Y-R Yen, Guofu Cao, T. N. Johnson, Yuehe Lin, Giorgio Gratta, J. L. Wood, David Moore, J. J. Russell, T. Didberidze, A. Der Mesrobian-Kabakian, J.-L. Vuilleumier, K. S. Kumar, B. T. Cleveland, Liang Yang, M. J. Dolinski, S. Kravitz, A. Piepke, A. Burenkov, A. Karelin, A. Johnson, V.N. Stekhanov, David A. Sinclair, T. A. Winick, M. J. Jewell, K. Twelker, L. J. Wen, Alexis G. Schubert, R. MacLellan, M. G. Marino, P. S. Barbeau, V. A. Belov, and A. Dolgolenko

Subjects
Semileptonic decay, Physics, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, 7. Clean energy, 01 natural sciences, Lower limit, Xenon, chemistry, Excited state, 0103 physical sciences, Single phase, Atomic physics, Neutrino, 010306 general physics, Ground state
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless ββ decay of ^(136)Xe to the ground state of ^(136)Ba. We report here on a search for the two-neutrino ββ decay of 136Xe to the first 0+ excited state, 0^+_1, of ^(136)Ba based on a 100 kg yr exposure of ^(136)Xe. Using a specialized analysis employing a machine learning algorithm, we obtain a 90% CL half-life sensitivity of 1.7 × 10^(24) yr. We find no statistically significant evidence for the 2νββ decay to the excited state resulting in a lower limit of T^(2ν)_(1/2)(0^+ → 0^+_1) > 6.9 ×10^(23) yr at 90% CL. This observed limit is consistent with the estimated half-life of 2.5 × 10^(25) yr.

Published
2016
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3. Measurements of the ion fraction and mobility ofα−andβ-decay products in liquid xenon using the EXO-200 detector

Author

A. Craycraft, James G. Davis, I. Ostrovskiy, M. J. Dolinski, A. Karelin, C. G. Davis, Martin Breidenbach, S. J. Daugherty, David A. Sinclair, T. Walton, R. MacLellan, Liang Yang, M. J. Jewell, K. Twelker, B. Mong, A. Schubert, K. Graham, Giorgio Gratta, David Leonard, R. DeVoe, M. Weber, M. G. Marino, V.N. Stekhanov, Douglas H Beck, M. Danilov, P. Fierlinger, Thomas Koffas, W. M. Fairbank, R. Nelson, Y-R Yen, K. O'Sullivan, Guofu Cao, S. Johnston, X. S. Jiang, J. Wood, D. J. Auty, A. Der Mesrobian-Kabakian, Ryan Killick, L. J. Kaufman, R. Tsang, E. Smith, A. Burenkov, M. Coon, B. T. Cleveland, R. Gornea, Yuehe Lin, C. Chambers, A. Kuchenkov, T. Tolba, W. Feldmeier, A. Piepke, P. C. Rowson, L. J. Wen, A. Pocar, J. J. Russell, J.-L. Vuilleumier, K. S. Kumar, S. Delaquis, S. Kravitz, C. Licciardi, O. Ya. Zeldovich, A. Dolgolenko, M. Tarka, J. Farine, V. Belov, A. Robinson, T. Brunner, Justin Albert, Monica Dunford, U. Wichoski, J. D. Wright, T. N. Johnson, A.C. Odian, A. S. Johnson, P. S. Barbeau, C.Y. Prescott, T. Daniels, C. R. Hall, J. Walton, D. Fudenberg, M. Hughes, A. P. Waite, David Moore, and T. Didberidze

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, Charged particle, Ion, Ionization, Double beta decay, 0103 physical sciences, Alpha decay, Atomic physics, 010306 general physics, Crystal Ball
Abstract

Alpha decays in the EXO-200 detector are used to measure the fraction of charged $^{218}\text{Po}$ and $^{214}\text{Bi}$ daughters created from $\ensuremath{\alpha}$ and $\ensuremath{\beta}$ decays, respectively. $^{222}\text{Rn} \ensuremath{\alpha}$ decays in liquid xenon (LXe) are found to produce $^{218}\text{Po}^{+}$ ions $50.3\ifmmode\pm\else\textpm\fi{}3.0%$ of the time, while the remainder of the $^{218}\text{Po}$ atoms are neutral. The fraction of $^{214}\text{Bi}^{+}$ from $^{214}\text{Pb} \ensuremath{\beta}$ decays in LXe is found to be $76.4\ifmmode\pm\else\textpm\fi{}5.7%$, inferred from the relative rates of $^{218}\text{Po}$ and $^{214}\text{Po} \ensuremath{\alpha}$ decays in the LXe. The average velocity of $^{218}\text{Po}$ ions is observed to decrease for longer drift times. Initially the ions have a mobility of $0.390\ifmmode\pm\else\textpm\fi{}0.006\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$, and at long drift times the mobility is $0.219\ifmmode\pm\else\textpm\fi{}0.004\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$. Time constants associated with the change in mobility during drift of the $^{218}\text{Po}^{+}$ ions are found to be proportional to the electron lifetime in the LXe.

Published
2015
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4. Improved measurement of the2νββhalf-life of136Xe with the EXO-200 detector

Author

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

Subjects
Systematic error, Physics, Nuclear and High Energy Physics, Time projection chamber, 010308 nuclear & particles physics, Detector, Half-life, 01 natural sciences, Beta decay, Nuclear physics, Nuclear magnetic resonance, Homogeneous, Double beta decay, 0103 physical sciences, 010306 general physics, Fiducial marker
Abstract

We report on an improved measurement of the 2νββ half-life of ^(136)Xe 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-β decay searches with EXO-200, while emphasizing those directly related to the present measurement. The ^(136)Xe 2νββ half-life is found to be T^(2νββ)_(1/2) = 2.165±0.016(stat)±0.059(sys)×10^(21) yr. This is the most precisely measured half-life of any 2νββ decay to date.

Published
2014
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5. Vanishing Fermi—Gamow-Teller mixing in the positron decay ofCo58

Author

Wenke Lee, A. M. Sabbas, P. S. Kravitz, L. M. Chirovsky, M. E. Chen, Groves Joel L, and C. S. Wu

Subjects
Physics, Nuclear and High Energy Physics, Isotope, media_common.quotation_subject, Weak interaction, Asymmetry, Beta decay, Isospin, Mixing ratio, High Energy Physics::Experiment, Positron emission, Atomic physics, media_common, Fermi Gamma-ray Space Telescope
Abstract

The asymmetry parameter, A/sub ..beta../, in the positron decay of polarized /sup 58/Co has been measured to be +0.341 +- 0.013. Assuming the standard T-invariant V-A weak interaction theory, the Fermi to Gamow-Teller mixing ratio, y = C/sub V/M/sub F//C/sub A/M/sub GT/, was determined to be -0.005 +- 0.008. The vanishing value of y is consistent with the isospin selection rule for the Fermi matrix element.

Published
1983
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