Dense high-speed scintillator material of low afterglow

Details Dense high-speed scintillator material of low afterglow Dense high-speed scintillator material of low afterglow

2009-11-20

2011-10-11

Koslow, Carol M (Department: 1734)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C117S942000, C250S370110, C378S004000

Reexamination Certificate

active

08034258

ABSTRACT:
The invention relates to an inorganic scintillator material of formula Lu(2-y)Y(y-z-x)CexMzSi(1-v)M′vO5, in which:M represents a divalent alkaline earth metal andM′ represents a trivalent metal,(z+v) being greater than or equal to 0.0001 and less than or equal to 0.2;z being greater than or equal to 0 and less than or equal to 0.2;v being greater than or equal to 0 and less than or equal to 0.2;x being greater than or equal to 0.0001 and less than 0.1; andy ranging from (x+z) to 1.In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling. The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.

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Zavartsev et al, “Czochralski growth and characterisation of large Ce+3:Lu2sio5 single crystals co-doped with Mg+2 or Ca+2 or Tb+3 for sintillators”, Journ. Cry. Growth, 275, e2167-71, Jan. 1, 2005.
Y. Zavartsev et al, “Czochralski growth and characterisation of large Ce3 + :Lu2SiO5 Single crystals co-doped with Mg2+ or Ca2+ Tb3 + for scintillators”, Journal of Crystal Growth, vol. 275, No. 1-2, pp. e2167-e2171, 2005.

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