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Properties of LYSO and recent LSO scintillators for phoswich PET detectors

Pepin, C.M. ; Berard, P. ; Perrot, A.-L. ; Pepin, C. ; Houde, D. ; Lecomte, R. ; Melcher, C.L. ; Dautet, H.

IEEE transactions on nuclear science, 2004-06, Vol.51 (3), p.789-795 [Periódico revisado por pares]

New York: IEEE

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  • Título:
    Properties of LYSO and recent LSO scintillators for phoswich PET detectors
  • Autor: Pepin, C.M. ; Berard, P. ; Perrot, A.-L. ; Pepin, C. ; Houde, D. ; Lecomte, R. ; Melcher, C.L. ; Dautet, H.
  • Assuntos: Avalanche photodiodes ; Crystals ; Detectors ; Energy measurement ; Energy resolution ; Luminescence ; Photomultipliers ; Positron emission tomography ; Spectroscopy ; Timing
  • É parte de: IEEE transactions on nuclear science, 2004-06, Vol.51 (3), p.789-795
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
  • Descrição: The luminescence and nuclear spectroscopic properties of the new cerium-doped rare-earth scintillator lutetium-yttrium oxyorthosilicate (Lu/sub 0.6/Y/sub 1.4/Si/sub 0.5/:Ce, LYSO) were investigated and compared to those of both recent and older LSO crystals. UV-excited luminescent spectra outline important similarities between LYSO and LSO scintillators. The two distinct Ce1 and Ce2 luminescence mechanisms previously identified in LSO are also present in LYSO scintillators. The energy and timing resolutions were measured using avalanche photodiode (APD) and photomultiplier tube (PMT) readouts. The dependence of energy resolution on gamma-ray energy was also assessed to unveil the crystal intrinsic resolution parameters. In spite of significant progress in light output and luminescence properties, the energy resolution of these scintillators appears to still suffer from an excess variance in the number of scintillation photons. Pulse-shape discrimination between LYSO and LSO scintillators has been successfully achieved in phoswich assemblies, confirming LYSO, with a sufficient amount of yttrium to modify the decay time, to be a potential candidate for depth-of-interaction determination in multicrystal PET detectors.
  • Editor: New York: IEEE
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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