Radiation detection material and radiation detection device

Patent metadata

Field	Value
Publication number	US-11300693-B2
Application number	US-202017014291-A
Country	US
Kind code	B2
Filing date	Sep 8, 2020
Priority date	Dec 27, 2019
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

The embodiments provide a radiation detection material emitting fluorescence with high intensity and short lifetime, and also provide a radiation detection device. The polycrystalline radiation detection material of the embodiment is represented by the following formula (1)TlM1-x-yRxX3-z  (1).In the formula, M is at least one metal element selected form the group consisting of Ca, Sr, Ba and Mg; R is at least one luminescence center element selected form the group consisting of Ce, Pr, Yb and Nd; X is at least one halogen element selected form the group consisting of Cl, Br and F; and x, y and z are numbers satisfying the conditions of0≤x≤0.5,−0.1≤y≤0.1, and−0.5≤z≤1, respectively.

First claim

The invention claimed is:

1. A polycrystalline radiation detection material represented by the following formula (1)
TlM 1-x-y Ce x X 3-z   (1)

wherein
M is at least one element selected from the group consisting of Ca, Sr, Ba, and Mg;
X is at least one element selected from the group consisting of CI, Br, and F; and
x, y and z are numbers satisfying the conditions of
0.001≤x≤0.1,
−0.1≤y≤0.1,
−0.5≤z≤1, respectively.

2. The material according to claim 1 , wherein said element M is Mg.

3. The material according to claim 1 , wherein said element X is Cl.

4. The material according to claim 1 , which is in the form of a sintered body.

5. An imaging plate comprising the material according to claim 1 .

6. A radiation detection device which detects radiation by use of the material according to claim 1 .

7. The material according to claim 1 , wherein said number x satisfies the condition of 0.01≤x≤0.04.

8. The material according to claim 1 , wherein said polycrystalline radiation detection material is constituted of crystals having perovskite structures.

Assignees

• Toshiba Kk

Inventors

• Fukuda Yumi
• Albessard Keiko
• Essaki Kenji

Classifications

• H10F39/1898

  Indirect radiation image sensors, e.g. using luminescent members · CPC title

• G01T1/2023

  Selection of materials · CPC title

• C09K11/772 Primary

  with alkali or alkaline earth metals · CPC title

• G21K4/00

  Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens (photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50) · CPC title

• C09K11/7733

  with alkali or alkaline earth metals · CPC title