Sensitization of thermoluminescent dosimeter CaSO4:Dy by co-doping with Mn in particular proportion for measurement of low radiation doses and the method of preparation of CaSO4:Dy, Mn
US10273406B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 2, 2015 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Apr 25, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K4/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a thermoluminescent phosphor for the measurement of low radiation doses, including calcium sulphate (CaSO4), Dysprosium (Dy) and manganese (Mn), wherein Dy and Mn are present as dopants. A process for the preparation of a thermoluminescent phosphor is also provided. The process includes the steps of: separately dissolving calcium sulphate (CaSO4), Dysprosium chloride (DyCh) and Manganese chloride (MnC) in hot concentrated sulphuric acid, to obtain sulphuric acid solutions of CaSO4, DyCb and MnCb; mixing the solutions; and followed by slow evaporation of the solvent to obtain a powder of microcrystalline phosphor of CaSO4:Dy, Mn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.