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Title Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals
Author(s) Scandale, W (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Natochii, A (CERN ; Orsay, LAL ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) ; Zhovkovska, V (CERN ; Taras Shevchenko U.) ; Galluccio, F (INFN, Naples ; Naples U.) ; Addesa, F (INFN, Rome) ; Iacoangeli, F (INFN, Rome) ; Kovalenko, A D (Dubna, JINR) ; Taratin, A M (Dubna, JINR) ; Gavrikov, Yu A (St. Petersburg, INP) ; Ivanov, Yu M (St. Petersburg, INP) ; Koznov, M A (St. Petersburg, INP) ; Malkov, M V (St. Petersburg, INP) ; Malyarenko, L G (St. Petersburg, INP) ; Mamunct, I G (St. Petersburg, INP) ; Borg, J (Imperial Coll., London) ; James, T (Imperial Coll., London) ; Hall, G (Imperial Coll., London) ; Pesaresi, M (Imperial Coll., London)
Imprint 5 p.
In: Eur. Phys. J. C 80 (2020) 27
DOI 10.1140/epjc/s10052-019-7590-x
Subject category Accelerators and Storage Rings
Accelerator/Facility, Experiment CERN SPS
Abstract The rate of inelastic nuclear interactions in a short bent silicon crystal was precisely measured for the first time using a 180 GeV/c positive hadron beam produced in the North Experimental Area of the CERN SPS. An angular asymmetry dependence on the crystal orientation in the vicinity of the planar channeling minimum has been observed. For the inspected crystal, this probability is about $\sim 20%$ larger than in the amorphous case because of the atomic density increase along the particle trajectories in the angular range of volume reflection, whose dimension is determined by the crystal bending angle. Instead, for the opposite angular orientation with respect to the planar channeling, there is a smaller probability excess of $\sim 4%$.
Copyright/License publication: © 2020 The Authors (License: CC-BY-4.0)

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 Záznam vytvorený 2020-01-25, zmenený 2020-02-07

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