Measurement of the branching ratio of 16N, 15C, 12B, and 13B isotopes through the nuclear union capture reaction in the Super-Kamiokande detector

  • Y. Maekawa
  • , K. Abe
  • , S. Abe
  • , Y. Asaoka
  • , M. Harada
  • , Y. Hayato
  • , K. Hiraide
  • , K. Hosokawa
  • , K. Ieki
  • , M. Ikeda
  • , J. Kameda
  • , Y. Kanemura
  • , Y. Kataoka
  • , S. Miki
  • , S. Mine
  • , M. Miura
  • , S. Moriyama
  • , M. Nakahata
  • , S. Nakayama
  • , Y. Noguchi
  • G. Pronost, K. Sato, H. Sekiya, K. Shimizu, R. Shinoda, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takemoto, H. Tanaka, T. Yano, Y. Itow, T. Kajita, R. Nishijima, K. Okumura, T. Tashiro, T. Tomiya, X. Wang, P. Fernandez, L. Labarga, D. Samudio, B. Zaldivar, C. Yanagisawa, E. Kearns, J. Mirabito, L. Wan, T. Wester, B. W. Pointon, J. Bian, B. Cortez, N. J. Griskevich, Y. Jiang, M. B. Smy, H. W. Sobel, V. Takhistov, A. Yankelevich, J. Hill, M. C. Jang, S. H. Lee, D. H. Moon, R. G. Park, B. S. Yang, B. Bodur, K. Scholberg, C. W. Walter, A. Beauchêne, O. Drapier, A. Ershova, Th A. Mueller, A. D. Santos, P. Paganini, C. Quach, R. Rogly, T. Nakamura, J. S. Jang, R. P. Litchfield, L. N. Machado, F. J.P. Soler, J. G. Learned, K. Choi, N. Iovine, S. Cao, L. H.V. Anthony, D. Martin, N. W. Prouse, M. Scott, Y. Uchida, V. Berardi, N. F. Calabria, M. G. Catanesi, N. Ospina, E. Radicioni, A. Langella, G. DeRosa, G. Collazuol, M. Feltre, M. Mattiazzi, L. Ludovici, M. Gonin, L. Périssé, B. Quilain, S. Horiuchi, A. Kawabata, M. Kobayashi, Y. M. Liu, Y. Nishimura, R. Okazaki, R. Akutsu, M. Friend, T. Hasegawa, Y. Hino, T. Ishida, T. Kobayashi, M. Jakkapu, T. Matsubara, T. Nakadaira, K. Nakamura, Y. Oyama, A. PortocarreroYrey, K. Sakashita, T. Sekiguchi, T. Tsukamoto, N. Bhuiyan, G. T. Burton, R. Kralik, N. Latham, F. DiLodovico, J. Gao, T. Katori, J. Migenda, R. M. Ramsden, Z. Xie, S. Zsoldos, H. Ito, T. Sone, A. T. Suzuki, Y. Takagi, Y. Takeuchi, S. Wada, H. Zhong, J. Feng, L. Feng, S. Han, J. Hikida, J. R. Hu, Z. Hu, M. Kawaue, T. Kikawa, T. Nakaya, T. V. Ngoc, R. A. Wendell, K. Yasutome, S. J. Jenkins, N. McCauley, A. Tarrant, M. Fanì, M. J. Wilking, Z. Xie, Y. Fukuda, H. Menjo, Y. Yoshioka, J. Lagoda, M. Mandal, Y. S. Prabhu, J. Zalipska, M. Mori, M. Jia, J. Jiang, W. Shi, K. Hamaguchi, H. Ishino, Y. Koshio, F. Nakanishi, S. Sakai, T. Tada, T. Tano, T. Ishizuka, G. Barr, D. Barrow, L. Cook, S. Samani, D. Wark, A. Holin, F. Nova, S. Jung, J. Y. Yang, J. Yoo, J. E.P. Fannon, L. Kneale, M. Malek, J. M. McElwee, T. Peacock, P. Stowell, M. D. Thiesse, L. F. Thompson, S. T. Wilson, H. Okazawa, S. M. Lakshmi, E. Kwon, M. W. Lee, J. W. Seo, I. Yu, A. K. Ichikawa, K. D. Nakamura, S. Tairafune, A. Eguchi, S. Goto, H. Hayasaki, S. Kodama, Y. Masaki, Y. Mizuno, T. Muro, K. Nakagiri, Y. Nakajima, N. Taniuchi, E. Watanabe, M. Yokoyama, P. dePerio, S. Fujita, C. Jesús-Valls, K. Martens, Ll Marti, K. M. Tsui, M. R. Vagins, J. Xia, S. Izumiyama, M. Kuze, R. Matsumoto, K. Terada, R. Asaka, M. Ishitsuka, M. Shinoki, M. Sugo, M. Wako, K. Yamauchi, T. Yoshida, Y. Nakano, F. Cormier, R. Gaur, V. Gousy-Leblanc, M. Hartz, A. Konaka, X. Li, B. R. Smithers, S. Chen, Y. Wu, B. D. Xu, A. Q. Zhang, B. Zhang, M. Girgus, P. Govindaraj, M. Posiadala-Zezula, Y. S. Prabhu, S. B. Boyd, R. Edwards, D. Hadley, M. Nicholson, M. O’Flaherty, B. Richards, A. Ali, B. Jamieson, S. Amanai, C. Bronner, D. Horiguchi, A. Minamino, Y. Sasaki, R. Shibayama, R. Shimamura

Research output: Contribution to journalArticlepeer-review

Abstract

The Super-Kamiokande detector has measured solar neutrinos for more than 25 years. The sensitivity for solar neutrino measurement is limited by the uncertainties of energy scale and background modeling. Decays of unstable isotopes with relatively long half-lives through nuclear muon capture, such as 16N, 15C, 12B, and 13B, are detected as background events for solar neutrino observations. In this study, we developed a method to form a pair of stopping muon and decay candidate events and evaluated the production rates of such unstable isotopes. We then measured their branching ratios considering both their production rates and the estimated number of nuclear muon capture processes as Br(16N) = (9.0 ± 0.1)%,Br(15C) = (0.6 ± 0.1)%, Br(12B) = (0.98 ±0.18)%, Br(13B) = (0.14 ± 0.12)%, respectively. The result for 16N has world-leading precision at present and the results for 15C, 12B, and 13B are the first branching ratio measurements for those isotopes.

Original languageEnglish
Article number064614
JournalPhysical Review C
Volume112
Issue number6
DOIs
Publication statusPublished - 1 Jan 2025

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