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Comparison of the scintillation properties of LSO:Ce manufactured by different laboratories and of LGSO:Ce

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7 Author(s)
Kapusta, M. ; Soltan Inst. for Nucl. Studies, Warsaw, Poland ; Moszynski, M. ; Balcerzyk, M. ; Braziewicz, J.
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We measured photoelectron yield, light output, decay times of the light pulses, cerium concentration, energy resolution and time resolution of LSO:Ce manufactured by different laboratories and LGSO:Ce. The LSO samples show excellent scintillation properties: high light output, close to 30,000 ph/MeV and good energy resolution of 7.3% FWHM for 137Cs γ- source full energy peak. Time resolution measured in geometry fulfilling the PET scanners requirements is equal to 450 ps. We also present results from the measurements with LGSO:Ce by Hitachi Chemical Co., which is of similar chemical composition to LSO. LGSO, at present stage of development, shows about 20% lower light output than LSO and energy resolution of 12.4% FWHM for 662 KeV γ-rays. LSO crystals used in our studies possess similar in scintillation properties, although we suppose that the details of the productions method are different due to the differences in Ce concentration. LGSO is a new and very promising scintillator due to lower background radiation in comparison to LSO, but it features worse energy resolution and smaller number of photoelectrons

Published in:

Nuclear Science, IEEE Transactions on  (Volume:47 ,  Issue: 4 )

Date of Publication:

Aug 2000

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