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Towards large calorimeters based on Lanthanum Bromide or LYSO crystals coupled to silicon photomultipliers: A first direct comparison for future precision physics by A. Papa; P. Schwendimann; A.M. Baldini; H. Benmansour; F. Cei; M. Chiappini; G. Chiarello; G. dal Maso; M. Francesconi; L. Galli; M. Grassi; U. Greuter; A. Gurgone; L. Kuenzi; D. Nicolo; S. Ritt; G. Signorelli; A. Venturini; B. Vitali is a Physics and Astronomy article available to read on EtoBox.

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Two very promising materials as the BrilLanCe (Cerium doped Lanthanum Bromide, LaBr 3 ( Ce ) and the LYSO (Lutetium Yttrium OxyorthoSilicate, Lu2(1−x) Y2x SiO5 (Ce)) coupled to Silicon photomultipliers (MPPC/SiPM) could represent an appealing option for the future calorimetry. The response of both LaBr 3 ( Ce ) and LYSO detectors having MPPC as photosensors have been studied via detailed Monte Carlo (MC) simulations. The impinging gammas are in the range of 50–100 MeV. The MC simulations are based on GEANT4, including the full electronic chain up to the waveform digitizer and finally the reconstruction algorithms. The results have been obtained are very promising. For a detector based on a (radius R = 4.45 cm, length L = 20.3 cm) LaBr 3 ( Ce ) crystal an energy resolution of σ E / E [ % ] = 2 . 3 ( 1 ) and a timing resolution of σ t [ps] = 35(1) have been predicted. The energy resolution can be further improved by using larger crystals (either R = 6.35 cm or R = 7.6 cm, L = 20.3 cm) approaching respectively a σ E / E [ % ] = 1 . 20 ( 3 ) or a σ E / E [ % ] = 0 . 91 ( 1 ) . Detector based on LYSO crystal of similar size performs even better, thanks to the shorter LYSO Moliere radius

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Author

A. Papa; P. Schwendimann; A.M. Baldini; H. Benmansour; F. Cei; M. Chiappini; G. Chiarello; G. dal Maso; M. Francesconi; L. Galli; M. Grassi; U. Greuter; A. Gurgone; L. Kuenzi; D. Nicolo; S. Ritt; G. Signorelli; A. Venturini; B. Vitali

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Physics and Astronomy (Physical Sciences)