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

Publication ,  Conference
Nakanishi, F; Abe, K; Bronner, C; Hayato, Y; Hiraide, K; Hosokawa, K; Ieki, K; Ikeda, M; Kameda, J; Kanemura, Y; Kaneshima, R; Kashiwagi, Y ...
Published in: Proceedings of Science
September 27, 2024

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.

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Published In

Proceedings of Science

EISSN

1824-8039

Publication Date

September 27, 2024

Volume

444
 

Citation

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Nakanishi, F., Abe, K., Bronner, C., Hayato, Y., Hiraide, K., Hosokawa, K., … Friend, M. (2024). Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment. In Proceedings of Science (Vol. 444).
Nakanishi, F., K. Abe, C. Bronner, Y. Hayato, K. Hiraide, K. Hosokawa, K. Ieki, et al. “Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment.” In Proceedings of Science, Vol. 444, 2024.
Nakanishi F, Abe K, Bronner C, Hayato Y, Hiraide K, Hosokawa K, et al. Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment. In: Proceedings of Science. 2024.
Nakanishi, F., et al. “Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment.” Proceedings of Science, vol. 444, 2024.
Nakanishi F, Abe K, Bronner C, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kaneshima R, Kashiwagi Y, Kataoka Y, Miki S, Mine S, Miura M, Moriyama S, Nakano Y, Nakahata M, Nakayama S, Noguchi Y, Sato K, Sekiya H, Shiba H, Shimizu K, Shiozawa M, Sonoda Y, Suzuki Y, Takeda A, Takemoto Y, Tanaka H, Yano T, Han S, Kajita T, Okumura K, Tashiro T, Tomiya T, Wang X, Yoshida S, Fernandez P, Labarga L, Ospina N, Zaldivar B, Pointon BW, Kearns E, Raaf JL, Wan L, Wester T, Bian J, Griskevich NJ, Locke S, Smy MB, Sobel HW, Takhistov V, Yankelevich A, Hill J, Lee SH, Moon DH, Park RG, Bodur B, Scholberg K, Walter CW, Beauchêne A, Drapier O, Giampaolo A, Mueller TA, Santos AD, Paganini P, Quilain B, Nakamura T, Jang JS, Machado LN, Learned JG, Choi K, Iovine N, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Sztuc AA, Uchida Y, Berardi V, Catanesi MG, Radicioni E, Calabria NF, Langella A, De Rosa G, Collazuol G, Iacob F, Mattiazzi M, Ludovici L, Gonin M, Pronost G, Fujisawa C, Maekawa Y, Nishimura Y, Okazaki R, Akutsu R, Friend M. Evaluation of neutron tagging efficiency on 0.03% Gd mass concentration in SK-Gd experiment. Proceedings of Science. 2024.

Published In

Proceedings of Science

EISSN

1824-8039

Publication Date

September 27, 2024

Volume

444