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  • Measurement of the Electron-Neutrino Charged-Current Cross Sections on ^{127}$I with the COHERENT NaI$\nu$E detector
    An, P; Awe, C; Barbeau, P. S; Becker, B; Belov, V; Bernardi, I; Bock, C; Bolozdynya, A; Bouabid, R; Brown, A; Browning, J; Cabrera-Palmer, B; Cervantes, M; Conley, E; Daughhetee, J; Detwiler, J; Ding, K; Durand, M. R; Efremenko, Y; Elliott, S. R; Fabris, L; Febbraro, M; Rosso, A. Gallo; Galindo-Uribarri, A; Germer, A. C; Green, M. P; Hakenmüller, J; Heath, M. R; Hedges, S; Hughes, M; Johnson, B. A; Johnson, T; Khromov, A; Konovalov, A; Kozlova, E; Kumpan, A; Kyzylova, O; Li, L; Link, J. M; Liu, J; Mahoney, M; Major, A; Mann, K; Markoff, D. M; Mastroberti, J; Mattingly, J; Mueller, P. E; Newby, J; Parno, D. S; Penttila, S. I; Pershey, D; Prior, C. G; Rapp, R; Ray, H; Raybern, J; Razuvaeva, O; Reyna, D; Rich, G. C; Ross, J; Rudik, D; Runge, J; Salvat, D. J; Sander, J; Scholberg, K; Shakirov, A; Simakov, G; Sinev, G; Skuse, C; Snow, W. M; Sosnovtsev, V; Subedi, T; Suh, B; Tayloe, R; Tellez-Giron-Flores, K; Tsai, Y. -T; Ujah, E; Vanderwerp, J; van Nieuwenhuizen, E. E; Varner, R. L; Virtue, C. J; Visser, G; Walkup, K; Ward, E. M; Wongjirad, T; Yoo, J; Yu, C. -H; Zawada, A; Zettlemoyer, J; Zderic, A

    05/2023
    Journal Article

    Phys. Rev. Lett. 131, 221801 (2023) Using an 185-kg NaITl array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}$I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy ($\leq$ 50 MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos of $9.2^{+2.1}_{-1.8} \times 10^{-40}$ cm$^2$. This corresponds to a value that is $\sim$41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on $^{127}$I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be $5.2^{+3.4}_{-3.1} \times 10^{-40}$ and $2.2^{+3.5}_{-2.2} \times 10^{-40}$ cm$^2$, respectively.

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