Thermoluminescence radiation dosimetry using transparent glass containing nanocrystalline phosphor
First Claim
1. A method for detecting the presence of radiation in an environment in which radiation is present, said method comprising:
- placing a thermoluminescent radiation dosimeter in said environment for a predetermined period of time,removing said irradiated dosimeter from said environment and then heating said irradiated dosimeter so that it emits thermoluminescent light of an intensity indicative of the absorbed dose and determining the absorbed dose from said emitted light,wherein said dosimeter comprises nanocrystalline thermoluminescent phosphor particles dispersed throughout a light transparent, glassy matrix.
1 Assignment
0 Petitions
Accused Products
Abstract
Radiation is detected using a light transparent thermoluminescent dosimeter that comprises a nanocrystalline phosphor dispersed in a light transparent glassy matrix, such as Vycor glass. The dosimeter is placed in an environment in which radiation is present for a period of time, removed from the environment and then heated to emit light, the intensity of which is indicative of the radiation dose. The method of the invention is useful for detecting and recording the dosage of both UV and ionizing radiation. In one embodiment in which the dosimeter is in the form of a flat plate. Ambient α or β radiation populates traps and, upon heating of the flat dosimeter, the emitted light is guided to the edges of the dosimeter by total internal reflection, where it is detected and recorded.
-
Citations
21 Claims
-
1. A method for detecting the presence of radiation in an environment in which radiation is present, said method comprising:
-
placing a thermoluminescent radiation dosimeter in said environment for a predetermined period of time, removing said irradiated dosimeter from said environment and then heating said irradiated dosimeter so that it emits thermoluminescent light of an intensity indicative of the absorbed dose and determining the absorbed dose from said emitted light, wherein said dosimeter comprises nanocrystalline thermoluminescent phosphor particles dispersed throughout a light transparent, glassy matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for detecting radiation and determining absorbed dosage using a thermoluminescent dosimeter which comprises nanocrystalline thermoluminescent phosphor particles dispersed throughout a light transparent, glassy matrix, said method comprising the steps of:
-
(i) exposing said dosimeter to a radiation containing environment for a predetermined period of time; (ii) removing the irradiated dosimeter from said environment; (iii) heating said irradiated dosimeter to produce a thermoluminescent glow curve; (iv) recording said glow curve and comparing it with glow curves obtained from a known radiation dose, and (v) determining the radiation dosage experienced by said dosimeter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
- 19. A method for detecting radiation in an environment in which said radiation is present, said method comprising placing a thermoluminescent radiation dosimeter in said environment for a predetermined period of time, removing said irradiated dosimeter from said environment and then heating said irradiated dosimeter so that it emits thermoluminescent light of an intensity indicative of the absorbed dose and determining the absorbed dose from said emitted light, wherein said dosimeter is in the form of a flat plate with parallel faces and comprises nanocrystalline thermoluminescent phosphor particles dispersed throughout a light transparent, glassy matrix, and wherein said emitted light is guided by total internal reflection to the edges of said dosimeter where it is detected.
-
21. A thermoluminescent dosimeter which comprises nanocrystalline thermoluminescent phosphor particles dispersed throughout a light transparent, glassy matrix in the form of a flat plate with parallel faces, whereby thermoluminescent light emitted by said dosimeter is guided by total internal reflection to the edges of said dosimeter.
Specification