Title :
New LSO based scintillators
Author :
Iwanczyk, J.S. ; Patt, B.E. ; Tull, C.R. ; MacDonald, L.R. ; Bescher, Eric ; Robson, S.R. ; Mackenzie, J.D. ; Hoffman, E.J.
Author_Institution :
Photon Energy Inc., Northridge, CA, USA
fDate :
12/1/2000 12:00:00 AM
Abstract :
Cerium-doped lutetium oxyorthosilicate (LSO) is amongst the most promising new scintillators discovered in almost five decades, with a unique combination of important properties for X and gamma-ray spectroscopy, namely: high density, fast decay, and large light yield. LSO seems to be a prime candidate to replace BGO in PET systems. However, the practical utilization of LSO is hindered by difficulties related to crystal growth (Czochralski method) due to the high temperatures employed. A new approach has been developed using a low-temperature crystal growth technology to produce scintillating LSO crystals. Light transparent polycrystalline LSO samples of a few mm3 in volume were grown and characterized by XRD, optical absorption, light decay measurement and gamma-ray spectral response. The properties of the new crystals compared well with high-quality crystals grown by the Czochralski method
Keywords :
X-ray detection; X-ray diffraction; X-ray spectroscopy; cerium; crystal growth from melt; gamma-ray detection; gamma-ray spectroscopy; lutetium compounds; solid scintillation detectors; Czochralski method; LSO based scintillators; Lu2SiO5:Ce; X-ray diffraction; X-ray spectroscopy; crystal growth; gamma-ray spectral response; gamma-ray spectroscopy; light decay; optical absorption; Biomedical imaging; Crystalline materials; Crystallization; Crystals; Drives; Optical imaging; Photonics; Positron emission tomography; Spectroscopy; Temperature;
Journal_Title :
Nuclear Science, IEEE Transactions on
