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US 10,710,885 B2Granted
Germanium-68 source material and calibration devices that include such source material
AssigneeCurium US LLC
InventorLuis Antonio M. M. Barbosa
Life of this patent
Estimating the term…
Abstract
Calibration devices including germanium-68 source material are disclosed. The source material may be a matrix material (e.g., zeolite) in which germanium-68 is isomorphously substituted for central atoms in tetrahedra within the matrix material. Methods for preparing such calibration devices are also disclosed.
Claims20
A solid-state germanium-68 source material comprising:
- a matrix material having a three-dimensional polyhedral crystal structure, the matrix material comprising:
- a first tetrahedra comprising a central atom, T, and oxygen, the central atom being selected from the group consisting of silicon, aluminum, zirconium and stable germanium, the first tetrahedra having a formula TO4;
- and
- a second tetrahedra, the second tetrahedra being a germanium-68 tetrahedra comprising germanium-68 and oxygen and having a formula 68GeO4, the first tetrahedra and germanium-68 tetrahedra being part of a three-dimensional polyhedral crystal structure.
1 more element
A method for producing a germanium-68 source material, the source material comprising a matrix material with germanium-68 isomorphously substituted therein, the method comprising:
- forming a crystallization starting mixture, the starting mixture having a source of a first central atom and a source of a second central atom, the first central atom being germanium-68 and the second central atom being selected from the group consisting of silicon, aluminum, zirconium and stable germanium;
- and
- heating the starting mixture to cause the material to crystallize and form germanium-68 tetrahedra and tetrahedra of the second central atom in a crystallized structure.
Dependencies are inferred from the claim text.