GB792071A - Improvements in or relating to scintillation material and methods of making same - Google Patents
Improvements in or relating to scintillation material and methods of making sameInfo
- Publication number
- GB792071A GB792071A GB3843/56A GB384356A GB792071A GB 792071 A GB792071 A GB 792071A GB 3843/56 A GB3843/56 A GB 3843/56A GB 384356 A GB384356 A GB 384356A GB 792071 A GB792071 A GB 792071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystals
- activator
- host
- compacted
- iodide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Luminescent Compositions (AREA)
Abstract
792,071. Luminescent materials. ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY. Feb. 7, 1956 [Feb. 24, 1955], No. 3843/56. Class 39(1). Scintillation phosphor material comprises an autogenously bonded polycrystalline compact of a host compound and an activator. A mixed crystal may be crystallized from a solution of an activator in a molten mass of the host crystals, e.g., thallium chloride or iodide crystals are added to fused sodium iodide or lithium iodide. The mixture is cooled and the mixed crystals are further sub-divided by grinding and then compacted in a device as in Fig. 2 comprising a base plate 18, top plate 19 and body 17, seal rings 21, 22 of resilient material, split cones 24, 25 and a reciprocating plunger 28. A further sealing ring 30 and a helical returns spring 31 are provided round the neck of the plunger. Pressures of 120,000 lbs./sq. in. can be applied. A bore 36 connects the moulding cavity to a source of reduced pressure so as to eliminate vacuum spaces between the crystals and prevent hydrolysis. The mixed crystals may also be formed by dissolving in a solvent and evaporating ; or a solution of host and activator compounds in a mixture of acetone and dry ice is rapidly cooled, subjected to freeze drying and dried over dessicating material. Cadmium sulphide crystals containing excess cadmium, naphthalene or anthracene may be similarly compacted. In a further method, microcrystalline particles of the host and the activator are compacted and heat treated to cause solid state diffusion. Zinc sulphide with a salt of silver, copper or manganese and a flux, e.g., sodium chloride, may be treated in this manner at a temperature below the melting point of the phosphor. The content of thallium in NaI/Tl may be 0À005-1 per cent, preferably 0À1 per cent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US792071XA | 1955-02-24 | 1955-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB792071A true GB792071A (en) | 1958-03-19 |
Family
ID=22149092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3843/56A Expired GB792071A (en) | 1955-02-24 | 1956-02-07 | Improvements in or relating to scintillation material and methods of making same |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB792071A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2386054A1 (en) * | 1977-03-28 | 1978-10-27 | Philips Nv | X-RAY DETECTOR |
EP0097295A1 (en) * | 1982-06-18 | 1984-01-04 | General Electric Company | Rare earth doped yttria-gadolinia ceramic scintillators and methods for making |
US4473513A (en) * | 1982-06-18 | 1984-09-25 | General Electric Company | Method for sintering high density yttria-gadolinia ceramic scintillators |
US4518546A (en) * | 1982-06-18 | 1985-05-21 | General Electric Company | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing |
US4571312A (en) * | 1982-06-18 | 1986-02-18 | General Electric Company | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing |
EP0182105A1 (en) * | 1984-11-01 | 1986-05-28 | Siemens Aktiengesellschaft | Scintillation crystal and method of making it |
US4839090A (en) * | 1971-09-13 | 1989-06-13 | Harshaw/Filtrol | Extrusion of macrocrystal scientillation phosphors |
US5521387A (en) * | 1985-12-30 | 1996-05-28 | General Electric Company | Radiation detector employing solid-state scintillator material and preparation methods therefor |
EP1981828A1 (en) * | 2006-01-30 | 2008-10-22 | Momentive Performance Materials Inc. | Sintered cubic halide scintillator material, and method for making same |
US10443935B2 (en) * | 2015-08-03 | 2019-10-15 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
US11781811B2 (en) | 2015-08-03 | 2023-10-10 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
-
1956
- 1956-02-07 GB GB3843/56A patent/GB792071A/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4839090A (en) * | 1971-09-13 | 1989-06-13 | Harshaw/Filtrol | Extrusion of macrocrystal scientillation phosphors |
FR2386054A1 (en) * | 1977-03-28 | 1978-10-27 | Philips Nv | X-RAY DETECTOR |
US4518546A (en) * | 1982-06-18 | 1985-05-21 | General Electric Company | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing |
US4473513A (en) * | 1982-06-18 | 1984-09-25 | General Electric Company | Method for sintering high density yttria-gadolinia ceramic scintillators |
US4571312A (en) * | 1982-06-18 | 1986-02-18 | General Electric Company | Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing |
EP0097295A1 (en) * | 1982-06-18 | 1984-01-04 | General Electric Company | Rare earth doped yttria-gadolinia ceramic scintillators and methods for making |
EP0182105A1 (en) * | 1984-11-01 | 1986-05-28 | Siemens Aktiengesellschaft | Scintillation crystal and method of making it |
US5521387A (en) * | 1985-12-30 | 1996-05-28 | General Electric Company | Radiation detector employing solid-state scintillator material and preparation methods therefor |
EP1981828A1 (en) * | 2006-01-30 | 2008-10-22 | Momentive Performance Materials Inc. | Sintered cubic halide scintillator material, and method for making same |
US7879284B2 (en) | 2006-01-30 | 2011-02-01 | Momentive Performance Materials Inc. | Method for making sintered cubic halide scintillator material |
US10443935B2 (en) * | 2015-08-03 | 2019-10-15 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
US11035613B2 (en) | 2015-08-03 | 2021-06-15 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
US11668525B2 (en) | 2015-08-03 | 2023-06-06 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
US11781811B2 (en) | 2015-08-03 | 2023-10-10 | Gen-Probe Incorporated | Apparatus for maintaining a controlled environment |
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