Strong Reduction of the Effective Radiation Length in an Axially Oriented Scintillator Crystal

L. Bandiera, V. V. Tikhomirov, M. Romagnoni, N. Argiolas, E. Bagli, G. Ballerini, A. Berra, C. Brizzolari, R. Camattari, D. De Salvador, V. Haurylavets, V. Mascagna, A. Mazzolari, M. Prest, M. Soldani, A. Sytov, and E. Vallazza
Phys. Rev. Lett. 121, 021603 – Published 12 July 2018

Abstract

We measured a considerable increase of the emitted radiation by 120GeV/c electrons in an axially oriented lead tungstate scintillator crystal, if compared to the case in which the sample was not aligned with the beam direction. This enhancement resulted from the interaction of particles with the strong crystalline electromagnetic field. The data collected at the external lines of the CERN Super Proton Synchrotron were critically compared to Monte Carlo simulations based on the Baier-Katkov quasiclassical method, highlighting a reduction of the scintillator radiation length by a factor of 5 in the case of beam alignment with the [001] crystal axes. The observed effect opens the way to the realization of compact electromagnetic calorimeters or detectors based on oriented scintillator crystals in which the amount of material can be strongly reduced with respect to the state of the art. These devices could have relevant applications in fixed-target experiments, as well as in satellite-borne γ telescopes.

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  • Received 2 May 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.021603

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear PhysicsCondensed Matter, Materials & Applied PhysicsAccelerators & BeamsAtomic, Molecular & OpticalInterdisciplinary Physics

Authors & Affiliations

L. Bandiera1,*, V. V. Tikhomirov2, M. Romagnoni1, N. Argiolas3, E. Bagli1, G. Ballerini4, A. Berra4, C. Brizzolari4, R. Camattari1, D. De Salvador3, V. Haurylavets2, V. Mascagna4, A. Mazzolari1, M. Prest4, M. Soldani4, A. Sytov1,2, and E. Vallazza5

  • 1INFN Sezione di Ferrara and Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara Via Saragat 1, 44122 Ferrara, Italy
  • 2Institute for Nuclear Problems, Belarusian State University, 220030 Minsk, Belarus
  • 3INFN Sezione di Legnaro and Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, 35131 Padova, Italy
  • 4INFN Sezione di Milano Bicocca and Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria Via Valleggio, 22100 Como, Italy
  • 5INFN Sezione di Trieste, Via Valerio 2, 34149 Trieste, Italy

  • *Corresponding author. bandiera@fe.infn.it

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Issue

Vol. 121, Iss. 2 — 13 July 2018

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