Fluoroperovskite radiation dosimeters and storage phosphors
OwnerChristian Josef Dotzler, Andrew Edgar +1inventors
InventorsChristian Josef Dotzler, Andrew Edgar, Grant Victor McLelland Williams
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Abstract
This invention provides phosphor-doped fluoroperovskite compounds that are capable of storing at least part of the energy of incident ionizing radiation and releasing at least part of the stored energy upon optical stimulation or heating. Also provided are dosimeters and radiation storage devices comprising the compounds, methods of preparing the compounds, and methods of using the compounds to determine a dose of ionizing radiation or to record and reproduce an ionizing radiation image.
Claims29
A phosphor-doped fluoroperovskite compound, wherein the compound stores at least part of the energy of incident ionizing radiation, and releases at least part of the stored energy upon optical stimulation, and wherein the phosphor-doped fluoroperovskite compound is selected from the group consisting of:
- NaMgF3:Zd+ wherein Zd+ is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- KMgF3:Zd+wherein Zd+is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- and
- RbMgF3:Zd+wherein Zd+is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Ce3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- and mixtures of any two or more thereof.
A phosphor-doped fluoroperovskite compound, wherein the compound stores at least part of the energy of incident ionizing radiation, and releases at least part of the stored energy upon heating, and wherein the phosphor-doped fluoroperovskite compound is selected from the group consisting of:
- NaMgF3:Zd+ wherein Zd+ is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- RbMgF3:Zd+wherein Zd+is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- and mixtures of any two or more thereof.
A method for preparing a phosphor-doped fluoroperovskite compound, wherein the phosphor-doped fluoroperovskite compound is selected from the group consisting of:
- NaMgF3:Zd+ wherein Zd+ is the dopant phosphor ion and is selected from the group consisting of:
- the transition Metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- KMgF3:Zd+wherein Zd+is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn2+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- and
- RbMgF3:Zd+wherein Zd+is the dopant phosphor ion and is selected from the group consisting of:
- the transition metal ions:
- Cu+;
- Ag+;
- Mn3+;
- Mn4+;
- and Cr3+;
- the rare earth metal ions:
- Eu2+;
- Sm2+;
- Sm3+;
- Pr3+;
- Ce3+;
- Gd3+;
- and Tb3+;
- and Tl+;
- In+;
- Ga+;
- and Pb2+;
- and mixtures of any two or more thereof, and wherein the phosphor-doped fluoroperovskite compound stores at least part of the energy of incident ionizing radiation, and releases at least part of the stored energy upon optical stimulation or upon heating, the method comprising the steps:
- (a) providing a mixture of precursor compounds;
- (b) heating the mixture to a temperature at or above the melting point of the mixture to form a homogenous melt, or heating the mixture to a temperature below the melting point of the mixture and sintering the mixture;
- and
- (c) cooling the melt to provide the phosphor-doped fluoroperovskite compound.
Dependencies are inferred from the claim text.