UV and gamma-ray excited luminescence of cerium-doped rare earth oxyorthosilicates

Gamma-ray and UV-excitation of cerium-doped rare-earth oxyorthosilicates (RE = Y, Gd, and Lu) has been used to investigate the emission mechanism for this family of scintillators. The data clearly indicate the presence of two different luminescence centers, which are attributed to cerium substitution in the two different rare-earth crystallographic sites. While this model explains much of the present and previous UV data, the gamma-ray induced emission from GSO requires a better understanding of the energy transfer between Gd and Ce.

[1]  H. Ishibashi.  Mechanism of luminescence from a cerium-doped gadolinium orthosilicate (Gd2SiO5) scintillator , 1990 .

[2]  J. Felsche.  The crystal chemistry of the rare-earth silicates , 1973 .

[3]  J. B. Birks,et al.  The Theory and Practice of Scintillation Counting , 1965 .

[4]  G. E. Thomas,et al.  Measurement of the Time Dependence of Scintillation Intensity by a Delayed‐Coincidence Method , 1961 .

[5]  C. Melcher,et al.  Scintillation properties of GSO , 1990 .

[6]  Masaaki Kobayashi,et al.  Excellent radiation-resistivity of cerium-doped gadolinium silicate scintillators , 1991 .

[7]  C. Su,et al.  Directional solidification of HgCdTe and HgZnTe in a transverse magnetic field , 1991 .

[8]  C. Brandle,et al.  Single‐Crystal Rare‐Earth‐Doped Yttrium Orthosilicate Phosphors , 1988 .

[9]  R. Summitt,et al.  Optical Interactions in Solids , 1968 .

[10]  Charles L. Melcher,et al.  A promising new scintillator: cerium-doped lutetium oxyorthosilicate , 1992 .

[11]  M. Sekita,et al.  Optical studies of Ce‐doped Gd2SiO5 single crystals , 1989 .

[12]  T. Utsu,et al.  Growth and applications of Gd2SiO5: Ce scintillators , 1991 .

[13]  M Dahlbom,et al.  Hybrid Mercuric Iodide (HgI2) - Gadolinium Orthosilicate (GSO) Detector for PET , 1985, IEEE Transactions on Nuclear Science.

[14]  K. Takagi,et al.  Cerium‐activated Gd2SiO5 single crystal scintillator , 1983 .

[15]  Xi Luo,et al.  Action of excessive fluorine in Ce-Mn activated calcium fluorophosphate on luminescence and synthesis mechanism , 1988 .

[16]  Li-Ji Lyu,et al.  Radiative and nonradiative relaxation measurements in Ce3+ doped crystals☆ , 1991 .