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  • Reactor Antineutrino Directionality Measurement with the PROSPECT-I Detector
    Andriamirado, M; Balantekin, B; Bass, C D; O Benevides Rodrigues; Bernard, E P; Bowden, N S; Bryan, C D; Carr, R; Classen, T; Conant, A J; Deichert, G; Dolinski, M J; Erickson, A; Galindo-Uribarri, A; Gokhale, S; Grant, C; Hans, S; Hansell, A B; Heeger, K M; Heffron, B; Jaffe, D E; Jayakumar, S; Jones, D C; Koblanski, J R; Kunkle, P; Lane, C E; Littlejohn, B R; A Lozano Sanchez; X Lu; Maricic, J; Mendenhall, M P; Meyer, A M; Milincic, R; Mueller, P E; Mumm, H; Napolitano, J; Nave, C; Neilson, R; Oueslati, M; Roca, C; Rosero, R; Surukuchi, P; Sutanto, F; Venegas-Vargas, D; Weatherly, P B; Wilhelmi, J; Yeh, M; Zhang, C; Zhang, X

    arXiv.org, 06/2024
    Paper, Journal Article

    The PROSPECT-I detector has several features that enable measurement of the direction of a compact neutrino source. In this paper, a detailed report on the directional measurements made on electron antineutrinos emitted from the High Flux Isotope Reactor is presented. With an estimated true neutrino (reactor to detector) direction of \(\phi = 40.8\unicode{xB0} \pm 0.7\unicode{xB0}\) and \(\theta = 98.6\unicode{xB0} \pm 0.4\unicode{xB0}\), the PROSPECT-I detector is able to reconstruct an average neutrino direction of \(\phi = 39.4\unicode{xB0} \pm 2.9\unicode{xB0}\) and \(\theta = 97.6\unicode{xB0} \pm 1.6\unicode{xB0}\). This measurement is made with approximately 48000 Inverse Beta Decay signal events and is the most precise directional reconstruction of reactor antineutrinos to date.

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