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  1. Book ; Online: Long-Term Testing and Properties of Acrylic for the Daya Bay Antineutrino Detectors

    Krohn, M. / Littlejohn, B. R. / Heeger, K. M.

    2012  

    Abstract: The Daya Bay reactor antineutrino experiment has recently measured the neutrino mixing parameter sin22{\theta}13 by observing electron antineutrino disappearance over kilometer-scale baselines using six antineutrino detectors at near and far distances ... ...

    Abstract The Daya Bay reactor antineutrino experiment has recently measured the neutrino mixing parameter sin22{\theta}13 by observing electron antineutrino disappearance over kilometer-scale baselines using six antineutrino detectors at near and far distances from reactor cores at the Daya Bay nuclear power complex. Liquid scintillator contained in transparent target vessels is used to detect electron antineutrinos via the inverse beta-decay reaction. The Daya Bay experiment will operate for about five years yielding a precision measurement of sin22{\theta}13. We report on long-term studies of poly(methyl methacrylate) known as acrylic, which is the primary material used in the fabrication of the target vessels for the experiment's antineutrino detectors. In these studies, acrylic samples are subjected to gaseous and liquid environmental conditions similar to those experienced during construction, transport, and operation of the Daya Bay acrylic target vessels and detectors. Mechanical and optical stability of the acrylic as well as its interaction with detector liquids is reported.

    Comment: 17 pages, 13 figures Submitted to JINST
    Keywords Physics - Instrumentation and Detectors ; High Energy Physics - Experiment
    Subject code 660
    Publishing date 2012-06-09
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Experimental Parameters for a Reactor Antineutrino Experiment at Very Short Baselines

    Heeger, K. M. / Littlejohn, B. R. / Mumm, H. P. / Tobin, M. N.

    2012  

    Abstract: Reactor antineutrinos are used to study neutrino oscillation, search for signatures of non-standard neutrino interactions, and to monitor reactor operation for safeguard applications. The flux and energy spectrum of reactor antineutrinos can be predicted ...

    Abstract Reactor antineutrinos are used to study neutrino oscillation, search for signatures of non-standard neutrino interactions, and to monitor reactor operation for safeguard applications. The flux and energy spectrum of reactor antineutrinos can be predicted from the decays of the nuclear fission products. A comparison of recent reactor calculations with past measurements at baselines of 10-100m suggests a 5.7% deficit. Precision measurements of reactor antineutrinos at very short baselines O(1-10 m) can be used to probe this anomaly and search for possible oscillations into sterile neutrino species. This paper studies the experimental requirements for a new reactor antineutrino measurement at very short baselines and calculates the sensitivity of various scenarios. We conclude that an experiment at a typical research reactor provides 5{\sigma} discovery potential for the favored oscillation parameter space with 3 years of data collection.

    Comment: 22 pages, 18 figures, 4 tables
    Keywords High Energy Physics - Experiment ; Nuclear Experiment
    Subject code 660
    Publishing date 2012-12-10
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Tritium Beta Spectrum Measurement and Neutrino Mass Limit from Cyclotron Radiation Emission Spectroscopy.

    Ashtari Esfahani, A / Böser, S / Buzinsky, N / Carmona-Benitez, M C / Claessens, C / de Viveiros, L / Doe, P J / Fertl, M / Formaggio, J A / Gaison, J K / Gladstone, L / Grando, M / Guigue, M / Hartse, J / Heeger, K M / Huyan, X / Johnston, J / Jones, A M / Kazkaz, K /
    LaRoque, B H / Li, M / Lindman, A / Machado, E / Marsteller, A / Matthé, C / Mohiuddin, R / Monreal, B / Mueller, R / Nikkel, J A / Novitski, E / Oblath, N S / Peña, J I / Pettus, W / Reimann, R / Robertson, R G H / Rosa De Jesús, D / Rybka, G / Saldaña, L / Schram, M / Slocum, P L / Stachurska, J / Sun, Y-H / Surukuchi, P T / Tedeschi, J R / Telles, A B / Thomas, F / Thomas, M / Thorne, L A / Thümmler, T / Tvrznikova, L / Van De Pontseele, W / VanDevender, B A / Weintroub, J / Weiss, T E / Wendler, T / Young, A / Zayas, E / Ziegler, A

    Physical review letters

    2023  Volume 131, Issue 10, Page(s) 102502

    Abstract: The absolute scale of the neutrino mass plays a critical role in physics at every scale, from the subatomic to the cosmological. Measurements of the tritium end-point spectrum have provided the most precise direct limit on the neutrino mass scale. In ... ...

    Abstract The absolute scale of the neutrino mass plays a critical role in physics at every scale, from the subatomic to the cosmological. Measurements of the tritium end-point spectrum have provided the most precise direct limit on the neutrino mass scale. In this Letter, we present advances by Project 8 to the cyclotron radiation emission spectroscopy (CRES) technique culminating in the first frequency-based neutrino mass limit. With only a cm^{3}-scale physical detection volume, a limit of m_{β}<155  eV/c^{2} (152  eV/c^{2}) is extracted from the background-free measurement of the continuous tritium beta spectrum in a Bayesian (frequentist) analysis. Using ^{83m}Kr calibration data, a resolution of 1.66±0.19  eV (FWHM) is measured, the detector response model is validated, and the efficiency is characterized over the multi-keV tritium analysis window. These measurements establish the potential of CRES for a high-sensitivity next-generation direct neutrino mass experiment featuring low background and high resolution.
    Language English
    Publishing date 2023-09-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.102502
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Final Measurement of the ^{235}U Antineutrino Energy Spectrum with the PROSPECT-I Detector at HFIR.

    Andriamirado, M / Balantekin, A B / Bass, C D / Bergeron, D E / Bernard, E P / Bowden, N S / Bryan, C D / Carr, R / Classen, T / Conant, A J / Deichert, G / Delgado, A / Diwan, M V / Dolinski, M J / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribari, A / Gilbert, C E /
    Gokhale, S / Grant, C / Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Jayakumar, S / Ji, X / Jones, D C / Koblanski, J / Kunkle, P / Kyzylova, O / LaBelle, D / Lane, C E / Langford, T J / LaRosa, J / Littlejohn, B R / Lu, X / Maricic, J / Mendenhall, M P / Meyer, A M / Milincic, R / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Nour, S / Palomino Gallo, J L / Pushin, D A / Qian, X / Roca, C / Rosero, R / Searles, M / Surukuchi, P T / Sutanto, F / Tyra, M A / Venegas-Vargas, D / Weatherly, P B / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, C / Zhang, X

    Physical review letters

    2023  Volume 131, Issue 2, Page(s) 21802

    Abstract: This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely ^{235}U-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from ... ...

    Abstract This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely ^{235}U-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from previously unused detector segments, this analysis effectively doubles the statistics of the previous PROSPECT measurement. The reconstructed energy spectrum is unfolded into antineutrino energy and compared with both the Huber-Mueller model and a spectrum from a commercial reactor burning multiple fuel isotopes. A local excess over the model is observed in the 5-7 MeV energy region. Comparison of the PROSPECT results with those from commercial reactors provides new constraints on the origin of this excess, disfavoring at 2.0 and 3.7 standard deviations the hypotheses that antineutrinos from ^{235}U are solely responsible and noncontributors to the excess observed at commercial reactors, respectively.
    Language English
    Publishing date 2023-07-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.021802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Erratum: Measurement of the 2νββ Decay Half-Life of ^{130}Te with CUORE [Phys. Rev. Lett. 126, 171801 (2021)].

    Adams, D Q / Alduino, C / Alfonso, K / Avignone, F T / Azzolini, O / Bari, G / Bellini, F / Benato, G / Biassoni, M / Branca, A / Brofferio, C / Bucci, C / Camilleri, J / Caminata, A / Campani, A / Canonica, L / Cao, X G / Capelli, S / Cappelli, L /
    Cardani, L / Carniti, P / Casali, N / Chiesa, D / Clemenza, M / Copello, S / Cosmelli, C / Cremonesi, O / Creswick, R J / D'Addabbo, A / Dafinei, I / Davis, C J / Dell'Oro, S / Di Domizio, S / Dompè, V / Fang, D Q / Fantini, G / Faverzani, M / Ferri, E / Ferroni, F / Fiorini, E / Franceschi, M A / Freedman, S J / Fu, S H / Fujikawa, B K / Giachero, A / Gironi, L / Giuliani, A / Gorla, P / Gotti, C / Gutierrez, T D / Han, K / Heeger, K M / Huang, R G / Huang, H Z / Johnston, J / Keppel, G / Kolomensky, Yu G / Ligi, C / Ma, L / Ma, Y G / Marini, L / Maruyama, R H / Mayer, D / Mei, Y / Moggi, N / Morganti, S / Napolitano, T / Nastasi, M / Nikkel, J / Nones, C / Norman, E B / Nucciotti, A / Nutini, I / O'Donnell, T / Ouellet, J L / Pagan, S / Pagliarone, C E / Pagnanini, L / Pallavicini, M / Pattavina, L / Pavan, M / Pessina, G / Pettinacci, V / Pira, C / Pirro, S / Pozzi, S / Previtali, E / Puiu, A / Rosenfeld, C / Rusconi, C / Sakai, M / Sangiorgio, S / Schmidt, B / Scielzo, N D / Sharma, V / Singh, V / Sisti, M / Speller, D / Surukuchi, P T / Taffarello, L / Terranova, F / Tomei, C / Vetter, K J / Vignati, M / Wagaarachchi, S L / Wang, B S / Welliver, B / Wilson, J / Wilson, K / Winslow, L A / Zimmermann, S / Zucchelli, S

    Physical review letters

    2024  Volume 131, Issue 24, Page(s) 249902

    Abstract: This corrects the article DOI: 10.1103/PhysRevLett.126.171801. ...

    Abstract This corrects the article DOI: 10.1103/PhysRevLett.126.171801.
    Language English
    Publishing date 2024-01-05
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.249902
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book ; Online: Daya Bay Antineutrino Detector Gas System

    Band, H. R. / Cherwinka, J. J. / Chu, M-C. / Heeger, K. M. / Kwok, M. W. / Shih, K. / Wise, T. / Xiao, Q.

    2012  

    Abstract: The Daya Bay Antineutrino Detector gas system is designed to protect the liquid scintillator targets of the antineutrino detectors against degradation and contamination from exposure to ambient laboratory air. The gas system is also used to monitor the ... ...

    Abstract The Daya Bay Antineutrino Detector gas system is designed to protect the liquid scintillator targets of the antineutrino detectors against degradation and contamination from exposure to ambient laboratory air. The gas system is also used to monitor the leak tightness of the antineutrino detector assembly. The cover gas system constantly flushes the gas volumes above the liquid scintillator with dry nitrogen to minimize oxidation of the scintillator over the five year lifetime of the experiment. This constant flush also prevents the infiltration of radon or other contaminants into these detecting liquids keeping the internal backgrounds low. Since the Daya Bay antineutrino detectors are immersed in the large water pools of the muon veto system, other gas volumes are needed to protect vital detector cables or gas lines. These volumes are also purged with dry gas. Return gas is monitored for oxygen content and humidity to provide early warning of potentially damaging leaks. The design and performance of the Daya Bay Antineutrino Detector gas system is described.

    Comment: submitted to JINST
    Keywords Physics - Instrumentation and Detectors ; High Energy Physics - Experiment ; Nuclear Experiment
    Subject code 660
    Publishing date 2012-10-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Book ; Online: Final Measurement of the U235 Antineutrino Energy Spectrum with the PROSPECT-I Detector at HFIR

    Adriamirado, M. / Balantekin, A. B. / Bass, C. D. / Bergeron, D. E. / Bernard, E. P. / Bowden, N. S. / Bryan, C. D. / Carr, R. / Classen, T. / Conant, A. J. / Deichert, G. / Delgado, A. / Diwan, M. V. / Dolinski, M. J. / Erickson, A. / Foust, B. T. / Gaison, J. K. / Galindo-Uribari, A. / Gilbert, C. E. /
    Gokhale, S. / Grant, C. / Hans, S. / Hansell, A. B. / Heeger, K. M. / Heffron, B. / Jaffe, D. E. / Jayakumar, S. / Ji, X. / Jones, D. C. / Koblanski, J. / Kunkle, P. / Kyzylova, O. / LaBelle, D. / Lane, C. E. / Langford, T. J. / LaRosa, J. / Littlejohn, B. R. / Lu, X. / Maricic, J. / Mendenhall, M. P. / Meyer, A. M. / Milincic, R. / Mueller, P. E. / Mumm, H. P. / Napolitano, J. / Neilson, R. / Nikkel, J. A. / Nour, S. / Gallo, J. L. Palomino / Pushin, D. A.

    2022  

    Abstract: This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely U235-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from ... ...

    Abstract This Letter reports one of the most precise measurements to date of the antineutrino spectrum from a purely U235-fueled reactor, made with the final dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By extracting information from previously unused detector segments, this analysis effectively doubles the statistics of the previous PROSPECT measurement. The reconstructed energy spectrum is unfolded into antineutrino energy and compared with both the Huber-Mueller model and a spectrum from a commercial reactor burning multiple fuel isotopes. A local excess over the model is observed in the 5MeV to 7MeV energy region. Comparison of the PROSPECT results with those from commercial reactors provides new constraints on the origin of this excess, disfavoring at 2.2 and 3.2 standard deviations the hypotheses that antineutrinos from U235 are solely responsible and non-contributors to the excess observed at commercial reactors respectively.

    Comment: The paper has been updated with an improved parametrization of the observed antineutrino spectrum excess and extended discussion on its potential isotopic origin
    Keywords Nuclear Experiment ; High Energy Physics - Experiment
    Subject code 660
    Publishing date 2022-12-20
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Joint Measurement of the ^{235}U Antineutrino Spectrum by PROSPECT and STEREO.

    Almazán, H / Andriamirado, M / Balantekin, A B / Band, H R / Bass, C D / Bergeron, D E / Bernard, L / Blanchet, A / Bonhomme, A / Bowden, N S / Bryan, C D / Buck, C / Classen, T / Conant, A J / Deichert, G / Del Amo Sanchez, P / Delgado, A / Diwan, M V / Dolinski, M J /
    El Atmani, I / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribarri, A / Gilbert, C E / Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Jayakumar, S / Ji, X / Jones, D C / Koblanski, J / Kyzylova, O / Labit, L / Lamblin, J / Lane, C E / Langford, T J / LaRosa, J / Letourneau, A / Lhuillier, D / Licciardi, M / Lindner, M / Littlejohn, B R / Lu, X / Maricic, J / Materna, T / Mendenhall, M P / Meyer, A M / Milincic, R / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Nour, S / Palomino, J L / Pessard, H / Pushin, D A / Qian, X / Réal, J-S / Ricol, J-S / Roca, C / Rogly, R / Rosero, R / Salagnac, T / Savu, V / Schoppmann, S / Searles, M / Sergeyeva, V / Soldner, T / Stutz, A / Surukuchi, P T / Tyra, M A / Varner, R L / Venegas-Vargas, D / Vialat, M / Weatherly, P B / White, C / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, C / Zhang, X

    Physical review letters

    2022  Volume 128, Issue 8, Page(s) 81802

    Abstract: The PROSPECT and STEREO collaborations present a combined measurement of the pure ^{235}U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at ... ...

    Abstract The PROSPECT and STEREO collaborations present a combined measurement of the pure ^{235}U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at research reactors are found to be compatible with χ^{2}/ndf=24.1/21, allowing a joint unfolding of the prompt energy measurements into antineutrino energy. This ν[over ¯]_{e} energy spectrum is provided to the community, and an excess of events relative to the Huber model is found in the 5-6 MeV region. When a Gaussian bump is fitted to the excess, the data-model χ^{2} value is improved, corresponding to a 2.4σ significance.
    Language English
    Publishing date 2022-03-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.081802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Book ; Online: PROSPECT-II Physics Opportunities

    Andriamirado, M. / Balantekin, A. B. / Band, H. R. / Bass, C. D. / Bergeron, D. E. / Bowden, N. S. / Bryan, C. D. / Carr, R. / Classen, T. / Conant, A. J. / Deichert, G. / Delgado, A. / Diwan, M. V. / Dolinski, M. J. / Erickson, A. / Foust, B. T. / Gaison, J. K. / Galindo-Uribari, A. / Gilbert, C. E. /
    Grant, C. / Hans, S. / Hansell, A. B. / Heeger, K. M. / Heffron, B. / Jaffe, D. E. / Jayakumar, S. / Ji, X. / Jones, D. C. / Koblanski, J. / Kunkle, P. / Kyzylova, O. / Lane, C. E. / Langford, T. J. / LaRosa, J. / Littlejohn, B. R. / Lu, X. / Maricic, J. / Mendenhall, M. P. / Meyer, A. M. / Milincic, R. / Mueller, P. E. / Mumm, H. P. / Napolitano, J. / Neilson, R. / Nikkel, J. A. / Nour, S. / Palomino, J. L. / Pushin, D. A. / Qian, X. / Rosero, R.

    2021  

    Abstract: The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, has made world-leading measurements of reactor antineutrinos at short baselines. In its first phase, conducted at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, ... ...

    Abstract The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, has made world-leading measurements of reactor antineutrinos at short baselines. In its first phase, conducted at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory, PROSPECT produced some of the strongest limits on eV-scale sterile neutrinos, made a precision measurement of the reactor antineutrino spectrum from $^{235}$U, and demonstrated the observation of reactor antineutrinos in an aboveground detector with good energy resolution and well-controlled backgrounds. The PROSPECT collaboration is now preparing an upgraded detector, PROSPECT-II, to probe yet unexplored parameter space for sterile neutrinos and contribute to a full resolution of the Reactor Antineutrino Anomaly, a longstanding puzzle in neutrino physics. By pressing forward on the world's most precise measurement of the $^{235}$U antineutrino spectrum and measuring the absolute flux of antineutrinos from $^{235}$U, PROSPECT-II will sharpen a tool with potential value for basic neutrino science, nuclear data validation, and nuclear security applications. Following a two-year deployment at HFIR, an additional PROSPECT-II deployment at a low enriched uranium reactor could make complementary measurements of the neutrino yield from other fission isotopes. PROSPECT-II provides a unique opportunity to continue the study of reactor antineutrinos at short baselines, taking advantage of demonstrated elements of the original PROSPECT design and close access to a highly enriched uranium reactor core.
    Keywords High Energy Physics - Experiment ; Nuclear Experiment ; Physics - Instrumentation and Detectors
    Subject code 660
    Publishing date 2021-07-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Nonfuel Antineutrino Contributions in the High Flux Isotope Reactor.

    Balantekin, A B / Band, H R / Bass, C D / Bergeron, D E / Berish, D / Bowden, N S / Brodsky, J P / Bryan, C D / Classen, T / Conant, A J / Deichert, G / Diwan, M V / Dolinski, M J / Erickson, A / Foust, B T / Gaison, J K / Galindo-Uribarri, A / Gilbert, C E / Hackett, B T /
    Hans, S / Hansell, A B / Heeger, K M / Heffron, B / Jaffe, D E / Ji, X / Jones, D C / Kyzylova, O / Lane, C E / Langford, T J / LaRosa, J / Littlejohn, B R / Lu, X / Maricic, J / Mendenhall, M P / Milincic, R / Mitchell, I / Mueller, P E / Mumm, H P / Napolitano, J / Neilson, R / Nikkel, J A / Norcini, D / Nour, S / Palomino-Gallo, J L / Pushin, D A / Qian, X / Romero-Romero, E / Rosero, R / Surukuchi, P T / Tyra, M A / Varner, R L / White, C / Wilhelmi, J / Woolverton, A / Yeh, M / Zhang, A / Zhang, C / Zhang, X

    Physical review. C

    2020  Volume 101

    Abstract: Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources ... ...

    Abstract Reactor neutrino experiments have seen major improvements in precision in recent years. With the experimental uncertainties becoming lower than those from theory, carefully considering all sources of
    Language English
    Publishing date 2020-11-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844098-5
    ISSN 2469-9993 ; 2469-9985
    ISSN (online) 2469-9993
    ISSN 2469-9985
    DOI 10.1103/PhysRevC.101.054605
    Database MEDical Literature Analysis and Retrieval System OnLINE

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