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AssigneeSaint-Gobain Cristaux Et Detecteurs
InventorsBernard FERRAND, Bruno Viana, Ludivine Pidol, Pieter Dorenbos
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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 and M′ 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; and y 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.
An inorganic scintillator material comprising Lu, Si, O, and M or M′ in which M represents a divalent alkaline earth metal ion and M′ and represents a trivalent metal chosen among Al, Ga, In, wherein M or M′ reduces the afterglow.
An inorganic scintillator material comprising Lu, Si, O, and Ca, wherein Ca reduces the afterglow.
An inorganic scintillator material comprising Lu, Si, O, and Al, wherein Al reduces the afterglow.
An inorganic scintillator material of formula Lu(2-y)CexCazSiO5, in which:
An inorganic scintillator material comprising Lu, Si, O, and M or M′ in which M represents a divalent alkaline earth metal ion and M′ represents a trivalent metal wherein M or M′ reduces the afterglow.
An inorganic scintillator material of formula
An inorganic scintillator material comprising a trivalent rare earth ion, Si, O and M or M′ in which M represents a divalent alkaline earth metal ion and M′ represents a trivalent metal wherein M or M′ substantially reduces the afterglow.
A method for reducing the afterglow of an inorganic scintillator material comprising Lu, Si, O wherein a divalent alkaline earth metal ion M or a trivalent metal M′ is added to said material.
A method for reducing the afterglow of an inorganic scintillator material comprising Lu, Si, O wherein Ca is added to said material.
A method for limiting the afterglow of a scintillator material comprising a trivalent rare-earth ion and a tetravalent silicon atom, wherein a divalent alkali metal ion M is introduced in said scintillator material for substituting for a trivalent rare-earth ion, or a trivalent metal ion M′ is introduced in said scintillator material for substituting for a tetravalent silicon atom.
Dependencies are inferred from the claim text.