Radiation detector
US4442360A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1981 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Apr 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2002
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A radiation detector comprising a scintillator exhibiting luminescence by the action of radioactive rays and a light detector detecting light output of said scintillator, characterized in that said scintillator is a phosphor represented by the formula: EQU (A.sub.1-x-y Ln.sub.x Ce.sub.y).sub.2 O.sub.2 S:X wherein A is at least one element selected from the group consisting of Y, La and Gd; Ln is at least one element selected from the group consisting of Pr, Tb and Eu; and X is at least one element selected from the group consisting of F, Cl and Br; and the values of x and y are 0.000003.gtoreq.x.gtoreq.0.2, and 0.000001.gtoreq.y.gtoreq.0.005, and the amount of X is 0 to 1000 ppm on weight basis, has a very short after glow time because of having Ce in the phosphor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.