Title :
Characteristics of the new YAlO3:Ce compared with BGO and GSO
Author :
Ziegler, S.I. ; Rogers, J.G. ; Selivanov, V. ; Sinitzin, I.
Author_Institution :
Inst. fuer Radiol. & Pathophyiol., DRFZ Heidelberg, Germany
fDate :
4/1/1993 12:00:00 AM
Abstract :
The characteristics of YAlO3:Ce (YALO) used as a fast scintillation detector with high density (5.35 gm/cm3) and high light yield were investigated and compared with those of other scintillation materials. The decay of the scintillation light could be described by the sum of two exponentials with decay constants of 31 ns and 246 ns and contributing 98% and 2% to the total light yield, respectively. The light yield of 19700 photons/MeV was measured by comparing the number of photoelectrons produced in YAlO in BGO under the same conditions. The energy resolution at a gamma ray energy of 511 keV was 6.7% for a 4.0×8.0×25.0 mm3 sample. The FWHM of a timing measurement using two YAlO crystals detecting annihilation quanta (with 200 keV threshold) was 1.1 ns. Monte Carlo simulations showed that the crystal depth for the absorption of 90% of 511 keV gamma quanta is 51.8 mm in YAlO (compared with 25.2 mm in BGO)
Keywords :
Monte Carlo methods; cerium; gamma-ray detection and measurement; luminescence of inorganic solids; photoluminescence; scintillation counters; yttrium compounds; 21 ns; 246 ns; 25.2 mm; 51.8 mm; 511 keV; Bi4Ge3O12; Gd2SiO5:Ce; Monte Carlo simulations; YAlO; YAlO3:Ce; decay constants; decay time; energy resolution; fast scintillation detector; light yield; scintillation light decay; timing resolution; Cerium; Crystalline materials; Crystals; Electromagnetic wave absorption; Optical materials; Photomultipliers; Plastics; Radiation detectors; Solid scintillation detectors; Time measurement;
Journal_Title :
Nuclear Science, IEEE Transactions on
