Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment

Super-Kamiokande Collaboration

Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment

Super-Kamiokande Collaboration

Okayama University
University of Tokyo
Long Beach VA and University of California
Universidad Autónoma de Madrid
British Columbia Institute of Technology
TRIUMF
Boston University
High Energy Accelerator Research Organization (KEK)
California State University, Dominguez Hills
Chonnam National University
Duke University
Ip Paris
Gifu University
Gwangju Institute of Science and Technology
University of Glasgow
University of Hawaii
Institute for Basic Science (IBS)
ICISE
Imperial College London
Politecnico di Bari
University of Naples Federico II
University of Padova
University of Rome
Keio University
King's College London
Kobe University
Kyoto University
University of Liverpool
Miyagi University of Education
Nagoya University
National Centre for Nuclear Research (NCBJ)
Stony Brook University
York College/The City University of New York
Osaka Electro-Communication University
University of Oxford
CCLRC Rutherford Appleton Laboratory
Seoul National University
The University of Sheffield
Shizuoka University of Welfare
Sungkyunkwan University
Tohoku University
Tokai University
Tokyo Institute of Technology
Tokyo University of Science
University of Victoria
Tsinghua University
University of Warsaw
University of Warwick
University of Winnipeg
Yokohama National University

Résultats de recherche: Contribution à un journal › Article de conférence › Revue par des pairs

Résumé

Super-Kamiokande (SK) experiment started the "SK-Gd experiment" by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detecting a total energy of 8 MeV gamma rays emitted by thermal neutron capture on Gd. It enables us to improve, for example, the sensitivity of diffuse supernova neutrino background, the accuracy of the reconstruction for the supernova direction, and so on. For these physics targets, accurate evaluation of neutron identification efficiency is essential. In this presentation, I report the calibration results using an Am/Be neutron source to evaluate the efficiency at a Gd mass concentration of 0.03%, starting from June 2022, and the comparison of the estimated neutron detection efficiency with simulation.

langue originale	Anglais
Numéro d'article	1172
journal	Proceedings of Science
Volume	444
état	Publié - 27 sept. 2024
Evénement	38th International Cosmic Ray Conference, ICRC 2023 - Nagoya, Japon Durée: 26 juil. 2023 → 3 août 2023

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@article{a14d4b0c8e9d46c2933e02b71e490fc9,

title = "Evaluation of neutron tagging efficiency on 0.03\% Gd mass concentration in SK-Gd experiment",

abstract = "Super-Kamiokande (SK) experiment started the {"}SK-Gd experiment{"} by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detecting a total energy of 8 MeV gamma rays emitted by thermal neutron capture on Gd. It enables us to improve, for example, the sensitivity of diffuse supernova neutrino background, the accuracy of the reconstruction for the supernova direction, and so on. For these physics targets, accurate evaluation of neutron identification efficiency is essential. In this presentation, I report the calibration results using an Am/Be neutron source to evaluate the efficiency at a Gd mass concentration of 0.03\%, starting from June 2022, and the comparison of the estimated neutron detection efficiency with simulation.",

author = "\{Super-Kamiokande Collaboration\} and Fumi Nakanishi and K. Abe and C. Bronner and Y. Hayato and K. Hiraide and K. Hosokawa and K. Ieki and M. Ikeda and J. Kameda and Y. Kanemura and R. Kaneshima and Y. Kashiwagi and Y. Kataoka and S. Miki and S. Mine and M. Miura and S. Moriyama and Y. Nakano and M. Nakahata and S. Nakayama and Y. Noguchi and K. Sato and H. Sekiya and H. Shiba and K. Shimizu and M. Shiozawa and Y. Sonoda and Y. Suzuki and A. Takeda and Y. Takemoto and H. Tanaka and T. Yano and S. Han and T. Kajita and K. Okumura and T. Tashiro and T. Tomiya and X. Wang and S. Yoshida and P. Fernandez and L. Labarga and N. Ospina and B. Zaldivar and Pointon, \{B. W.\} and E. Kearns and Raaf, \{J. L.\} and O. Drapier and P. Paganini and B. Quilain and M. Gonin",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 38th International Cosmic Ray Conference, ICRC 2023 ; Conference date: 26-07-2023 Through 03-08-2023",

year = "2024",

month = sep,

day = "27",

language = "English",

volume = "444",

journal = "Proceedings of Science",

issn = "1824-8039",

}

TY - JOUR

T1 - Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment

AU - Super-Kamiokande Collaboration

AU - Nakanishi, Fumi

AU - Abe, K.

AU - Bronner, C.

AU - Hayato, Y.

AU - Hiraide, K.

AU - Hosokawa, K.

AU - Ieki, K.

AU - Ikeda, M.

AU - Kameda, J.

AU - Kanemura, Y.

AU - Kaneshima, R.

AU - Kashiwagi, Y.

AU - Kataoka, Y.

AU - Miki, S.

AU - Mine, S.

AU - Miura, M.

AU - Moriyama, S.

AU - Nakano, Y.

AU - Nakahata, M.

AU - Nakayama, S.

AU - Noguchi, Y.

AU - Sato, K.

AU - Sekiya, H.

AU - Shiba, H.

AU - Shimizu, K.

AU - Shiozawa, M.

AU - Sonoda, Y.

AU - Suzuki, Y.

AU - Takeda, A.

AU - Takemoto, Y.

AU - Tanaka, H.

AU - Yano, T.

AU - Han, S.

AU - Kajita, T.

AU - Okumura, K.

AU - Tashiro, T.

AU - Tomiya, T.

AU - Wang, X.

AU - Yoshida, S.

AU - Fernandez, P.

AU - Labarga, L.

AU - Ospina, N.

AU - Zaldivar, B.

AU - Pointon, B. W.

AU - Kearns, E.

AU - Raaf, J. L.

AU - Drapier, O.

AU - Paganini, P.

AU - Quilain, B.

AU - Gonin, M.

PY - 2024/9/27

Y1 - 2024/9/27

N2 - Super-Kamiokande (SK) experiment started the "SK-Gd experiment" by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detecting a total energy of 8 MeV gamma rays emitted by thermal neutron capture on Gd. It enables us to improve, for example, the sensitivity of diffuse supernova neutrino background, the accuracy of the reconstruction for the supernova direction, and so on. For these physics targets, accurate evaluation of neutron identification efficiency is essential. In this presentation, I report the calibration results using an Am/Be neutron source to evaluate the efficiency at a Gd mass concentration of 0.03%, starting from June 2022, and the comparison of the estimated neutron detection efficiency with simulation.

AB - Super-Kamiokande (SK) experiment started the "SK-Gd experiment" by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detecting a total energy of 8 MeV gamma rays emitted by thermal neutron capture on Gd. It enables us to improve, for example, the sensitivity of diffuse supernova neutrino background, the accuracy of the reconstruction for the supernova direction, and so on. For these physics targets, accurate evaluation of neutron identification efficiency is essential. In this presentation, I report the calibration results using an Am/Be neutron source to evaluate the efficiency at a Gd mass concentration of 0.03%, starting from June 2022, and the comparison of the estimated neutron detection efficiency with simulation.

UR - https://www.scopus.com/pages/publications/85212306265

M3 - Conference article

AN - SCOPUS:85212306265

SN - 1824-8039

VL - 444

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 1172

T2 - 38th International Cosmic Ray Conference, ICRC 2023

Y2 - 26 July 2023 through 3 August 2023

ER -

Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment

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