Title :
Cerium-doped lutetium oxyorthosilicate: a fast, efficient new scintillator
Author :
Melcher, C.L. ; Schweitzer, J.S.
Author_Institution :
Schlumberger-Doll Res., Ridgefield, CT, USA
Abstract :
A new single-crystal inorganic scintillator, cerium-doped lutetium oxyorthosilicate (Lu/sub 2(1-x)/)Ce/sub 2x/(SiO/sub 4/)O or LSO, which has a number of advantages over existing scintillators has recently been discovered. It has a scintillation emission intensity which is approximately 75% of Na(Tl) with a decay time of approximately 40 ns. The peak emission wavelength is 420 nm. It has a very high gamma-ray detection efficiency due to its density of 7.4 g/cm/sup 3/ and its effective atomic number of 66. Its radiation length of 1.14 cm is only slightly longer than that of BGO (1.12 cm). Due to its unique combination of high emission intensity, speed, and high density and atomic number, LSO appears to be an attractive candidate for diverse applications, including medical imaging, high-energy physics experiments, and geophysical exploration.<>
Keywords :
cerium; gamma-ray detection and measurement; luminescence of inorganic solids; lutetium compounds; photoluminescence; scintillation; scintillation counters; (Lu/sub 2(1-x)/)Ce/sub 2x/(SiO/sub 4/)O; 1.14 cm; 40 ns; 420 nm; LSO; decay time; gamma-ray detection efficiency; geophysical; high-energy physics; lutetium oxyorthosilicate; medical imaging; peak emission wavelength; radiation length; scintillation emission intensity; Atomic measurements; Biomedical imaging; Computed tomography; Crystalline materials; Gamma ray detection; Gamma ray detectors; Nuclear physics; Optical refraction; Raw materials; Solid scintillation detectors;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.258886
