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@ARTICLE{Basilico:1038442,
      author       = {Basilico, D. and Bellini, G. and Benziger, J. and Biondi,
                      R. and Caccianiga, B. and Calaprice, F. and Caminata, A. and
                      Chepurnov, A. and D’Angelo, D. and Derbin, A. and Di
                      Giacinto, A. and Di Marcello, V. and Ding, X. F. and Di
                      Ludovico, A. and Di Noto, L. and Drachnev, I. and Franco, D.
                      and Galbiati, C. and Ghiano, C. and Giammarchi, M. and
                      Goretti, A. and Gromov, M. and Guffanti, D. and Ianni, Aldo
                      and Ianni, Andrea and Jany, A. and Kobychev, V. and Korga,
                      G. and Kumaran, S. and Laubenstein, M. and Litvinovich, E.
                      and Lombardi, P. and Lomskaya, I. and Ludhova, L. and
                      Machulin, I. and Martyn, J. and Meroni, E. and Miramonti, L.
                      and Misiaszek, M. and Muratova, V. and Nugmanov, R. and
                      Oberauer, L. and Orekhov, V. and Ortica, F. and Pallavicini,
                      M. and Pelicci, L. and Penek, Ö. and Pietrofaccia, L. and
                      Pilipenko, N. and Pocar, A. and Raikov, G. and Ranalli, M.
                      T. and Ranucci, G. and Razeto, A. and Re, A. and Rossi, N.
                      and Schönert, S. and Semenov, D. and Settanta, G. and
                      Skorokhvatov, M. and Singhal, A. and Smirnov, O. and
                      Sotnikov, A. and Tartaglia, R. and Testera, G. and Unzhakov,
                      E. and Vishneva, A. and Vogelaar, R. B. and von Feilitzsch,
                      F. and Wojcik, M. and Wurm, M. and Zavatarelli, S. and
                      Zuber, K. and Zuzel, G.},
      title        = {{O}ptimized α / β pulse shape discrimination in
                      {B}orexino},
      journal      = {Physical review / D},
      volume       = {109},
      number       = {11},
      issn         = {2470-0010},
      address      = {Ridge, NY},
      publisher    = {American Physical Society},
      reportid     = {FZJ-2025-01438},
      pages        = {112014},
      year         = {2024},
      abstract     = {Borexino could efficiently distinguish between 𝛼 and
                      𝛽 radiation in its liquid scintillator by the
                      characteristic time profile of its scintillation pulse. This
                      𝛼/𝛽 discrimination, first demonstrated on the ton
                      scale in the counting test facility prototype, was used
                      throughout the lifetime of the experiment between 2007 and
                      2021. With this method, the 𝛼 events are identified and
                      subtracted from the solar neutrino events similar to 𝛽.
                      This is particularly important in liquid scintillators, as
                      the 𝛼 scintillation is strongly quenched. In Borexino,
                      the prominent 210 Po decay peak was a background in the
                      energy range of electrons scattered from 7 Be solar
                      neutrinos. Optimal 𝛼/𝛽 discrimination was achieved
                      with a multilayer perceptron neural network, with a higher
                      ability to leverage the timing information of the
                      scintillation photons detected by the photomultiplier tubes.
                      An event-by-event, high efficiency, stable, and uniform
                      pulse shape discrimination was essential in characterizing
                      the spatial distribution of background in the detector. This
                      benefited most Borexino measurements, including solar
                      neutrinos in the 𝑝⁢𝑝 chain and the first direct
                      observation of the CNO cycle in the Sun. This paper presents
                      key milestones in 𝛼/𝛽 discrimination in Borexino as a
                      term of comparison for current and future large liquid
                      scintillator detectors.},
      cin          = {IKP-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-2-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001252569300001},
      doi          = {10.1103/PhysRevD.109.112014},
      url          = {https://juser.fz-juelich.de/record/1038442},
}