Wednesday, November 28, 2007, 2:30 pm — Large Seminar Room, Bldg. 535
Because of their high stopping power and fast bright scintillation,
cerium doped silicate based heavy crystal scintillators, such as GSO,
LSO and LYSO, have been developed for medical instruments.
Their applications in high energy and nuclear physics, however, are limited
by lacking high quality crystals in sufficiently large size. The optical and scintillation
properties, including the transmittance, emission and excitation spectra as well as
the light output and light response uniformity, were measured for long
(2.5 X 2.5 X 20 cm) LSO and LYSO samples from CTI, CPI, Saint-Gobain
and SIPAT, and were compared to a BGO sample of the same size.
Their degradation under Gamma-ray irradiation were also measured.
Possible applications for crystal calorimetry in future high energy and nuclear
physics experiments are discussed.
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