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US 12,449,555 B2Granted
CsI(T1) scintillator crystal including co-dopants antiomy and bismuth to reduce afterglow, and a radiation detection apparatus including the scintillation crystal
AssigneeLuxium Solutions, LLC
InventorsFang Meng, Peter R. Menge
Life of this patent
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Abstract
A scintillation crystal can include a cesium halide that is co-doped with thallium and another element. In an embodiment, the scintillation crystal can include CsI:Tl, Me, where Me represents co-doped Sb and Bi. In a particular embodiment, the scintillation crystal may have a cesium iodide host material, a first dopant including a thallium, a second dopant including an antimony, and a third dopant including a bismuth.
Claims20
A scintillator crystal comprising:
- a cesium iodide host material;
- a first dopant comprising a thallium, a molar concentration of said first dopant being less than 10%;
- a second dopant comprising an antimony, wherein a concentration of the second dopant in the scintillator crystal is greater than 0.02 ppm and no greater than 1.3 ppm;
- and
- a third dopant comprising bismuth, wherein a concentration of the third dopant in the scintillator crystal is greater than 0.027 ppm and no greater than 5.2 ppm, wherein the scintillator crystal has a reduced afterglow below 0.1% at 100 ms, and wherein an absolute light output is greater than 55000 ph/MeV.
2 more elements
A scintillator crystal comprising:
- a cesium iodide host material;
- a first dopant comprising a thallium, a molar concentration of said first dopant being less than 10%;
- a second dopant comprising an antimony, wherein a concentration of the second dopant in the scintillator crystal is greater than 0.02 ppm and no greater than 1.3 ppm;
- and
- a third dopant comprising bismuth, wherein a concentration of the third dopant in the scintillator crystal is greater than 0.027 ppm and no greater than 5.2 ppm, wherein the scintillator crystal has a reduced afterglow below 0.2% at 500 ms, and wherein a absolute light output is greater than 55000 ph/MeV.
2 more elements
A radiation detection apparatus comprising:
- a housing;
- and
- a scintillator within the housing, the scintillator comprising:
- a cesium iodide host material;
- a first dopant comprising a thallium, a molar concentration of said first dopant being less than 10%;
- and
- a second dopant comprising an antimony, wherein a concentration of the second dopant in the scintillator crystal is greater than 0.02 ppm and no greater than 1.3 ppm;
- and
- a third dopant comprising bismuth, wherein a concentration of the third dopant in the scintillator crystal is greater than 0.027 ppm and no greater than 5.2 ppm, wherein the scintillator crystal has a reduced afterglow below 0.1% at 100 ms, and wherein h absolute light output is greater than 55000 ph/MeV.
6 more elements
Dependencies are inferred from the claim text.