US4975222A
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Radiation detecting elements and method of detection
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-10-26
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Granted: 1990-12-04
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Expires: 2008-10-26
Abstract
Abstract Radiation detecting solid elements consisting of conductive polymers and radiation sensitive materials which are capable of generating radiation induced substances composing the dopant of the conductive polymers. The elements are monolayer sheets obtained by impregnating or compounding the conductive polymers, such as, polythiophene and polyselenophene, with radiation sensitive materials, such as, diphenyliodonium chloride and triphenylsulfonium hexafluoroarsenate(V). The elements are also laminated sheets consisting of conductive polymer films and radiation sensitive material containing films. As radiation exposure causes variation in electrical conductivity and absorption spectrum of the elements, radiation can be detected by the variation of these properties.
Inventors
- 👤 Katsumi Yoshino
- 👤 Ryuichi Sugimoto
- 👤 Jiro Okube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:49
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/04; G01T1/06; G01T1/16; G01T1/26
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
93 words
A radiation detecting solid element comprising a conductive polymer and a solid radiation sensitive material which decomposes and/or dissociates by exposure to at least one form of radiation selected from electron beams, gamma rays, alpha rays, beta rays, X-rays and neutron beams wherein a variation in electrical conductivity, light absorption characteristics or magnetic properties of the conductive polymer occurs, said variation being proportional to the total amount of radiation to which the element is exposed with the proviso that where electrical conductivity varies, the electrical conductivity increases with an increasing amount of radiation.
Claim 2
Dependent Claim
93 words
A radiation detecting solid element comprising a conductive polymer and a solid radiation sensitive material which decomposes and/or dissociates by exposure to at least one form of radiation selected from electron beams, gamma rays, alpha rays, beta rays, X-rays and neutron beams wherein a variation in electrical conductivity, light absorption characteristics or magnetic properties of the conductive polymer occurs, said variation being proportional to the total amount of radiation to which the element is exposed with the proviso that where electrical conductivity varies, the electrical conductivity increases with an increasing amount of radiation.
Claim 3
Dependent Claim
33 words
The radiation detecting solid element of claim 1, wherein said conductive polymer is a compound selected from the group consisting of polyacetylene, polythiophene, polypyrrole, polyfuran, polyselenophene, poly-para-phenylene, poly-para-phenylenesulfide, polyaniline, poly-para-phenylenevinylene, poly-para-phenyleneoxide, and polyheptadiyne.
Claim 4
Dependent Claim
71 words
The radiation detecting solid element of claim 1, wherein said radiation sensitive material is a compound selected from the group consisting of silver chloride, silver bromide, ferric fluoride, cupric fluoride, lead(II) iodide, bismuth(III) iodide, cuprous iodide, silver iodide, and cadmium iodide or diaryliodonium, triarylsulfonium, and aryldiazonium salts having an anion selected from the group consisting of fluoride ion, chloride ion, bromide ion, iodide ion, perchlorate ion, hexafluoroarsenate(V) ion, and hexafluoroantimonate(V) ion.
Claim 5
Dependent Claim
21 words
The radiation detecting solid element of claim 3, wherein said radiation sensitive material is diphenyliodonium chloride, diphenyliodonium hexafluoroarsenate(V) or triphenylsulfonium hexafluoroarsenate(V).
Claim 6
Dependent Claim
25 words
The radiation detecting solid element of claim 1, wherein said conductive polymer is polythiophene and said radiation sensitive materials are diphenyliodonium hexafluoroarsenate(V) or triphenylsulfonium hexafluoroarsenate(V).
Claim 7
Dependent Claim
24 words
The radiation detecting solid element of claim 1, wherein the element is a monolayer sheet of said conductive polymer containing said radiation sensitive material.
Claim 8
Dependent Claim
38 words
The radiation detecting solid element of claim 1, wherein the element is a laminated sheet comprising one layer of said conductive polymer and one layer of said radiation sensitive material, wherein both of the layers are in contact.
Claim 9
Dependent Claim
25 words
The radiation detecting solid element of claim 7, wherein a support layer is present on at least one side of said radiation detecting solid element.
Claim 10
Dependent Claim
15 words
The radiation detecting solid element of claim 1, wherein a variation in electrical conductivity results.
Claim 11
Dependent Claim
21 words
The radiation detecting solid element of claim 1, wherein a variation in light absorption properties results in a noticeable color change.
Claim 12
Dependent Claim
21 words
A radiation detector which comprises said radiation detecting solid element claimed in claim 1 and at least a pair of electrodes.
Claim 13
Dependent Claim
34 words
The radiation detector of claim 11, wherein said radiation detecting solid element is comprised of a monolayer sheet and at least a pair of electrodes is in contact with one side of said monolayer.
Claim 14
Dependent Claim
31 words
The radiation detector of claim 11, wherein said radiation detecting solid element is comprises of a monolayer sheet and said electrodes are in contact with both sides of said monolayer sheet.
Claim 15
Dependent Claim
46 words
The radiation detector of claim 11, wherein said radiation detecting solid element is a monolayer sheet having an inside layer and an outside layer and at least a pair of electrodes is in contact with the outside or inside layer of said radiation detecting solid element.
Claim 16
Dependent Claim
42 words
The radiation detector of claim 11, wherein said radiation detecting solid element is a monolayer sheet having an inside layer and an outside layer and electrodes are in contact with both sides of the layer of the radiation detecting solid element layer.
Claim 17
Independent Claim
92 words
A method for detecting at least one form of radiation selected from electron beams, gamma rays, alpha rays, beta rays, X-rays, and neutron beams comprising exposing a radiation detecting solid element comprising a conductive polymer and a solid radiation sensitive material which decomposes and/or dissociates by exposure to said radiation and determining the total amount of radiation by measuring a variation in electrical conductivity, light absorption characteristics or magnetic properties of the conductive polymer with the proviso that where electrical conductivity varies, the electrical conductivity increases with an increasing amount of radiation.
Claim 18
Independent Claim
92 words
A method for detecting at least one form of radiation selected from electron beams, gamma rays, alpha rays, beta rays, X-rays, and neutron beams comprising exposing a radiation detecting solid element comprising a conductive polymer and a solid radiation sensitive material which decomposes and/or dissociates by exposure to said radiation and determining the total amount of radiation by measuring a variation in electrical conductivity, light absorption characteristics or magnetic properties of the conductive polymer with the proviso that where electrical conductivity varies, the electrical conductivity increases with an increasing amount of radiation.
Claim 19
Dependent Claim
30 words
The method of claim 16, wherein said conductive polymer is a compound selected from the group consisting of polyacetylene, polythiophene, polypyrrole, polyfuran, polyselenophene, poly-para-phenylene, poly-para-phenylenesulfide, polyaniline, poly-para-phenylenevinylene, poly-para-phenyleneoxide, and polyheptadiyne.
Claim 20
Dependent Claim
68 words
The method of claim 16, wherein said radiation sensitive material is a compound selected from the group consisting of silver chloride, silver bromide, ferric fluoride, cupric fluoride, lead(II) iodide, bismuth(III) iodide, cuprous iodide, silver iodide, and cadmium iodide or diaryliodonium, triarylsulfonium, and aryldiazonium salts having an anion selected from the group consisting of fluoride ion, chloride ion, bromide ion, iodide ion, perchlorate ion, hexafluoroarsenate(V) ion, and hexafluoroantimonate(V) ion.
Claim 21
Dependent Claim
18 words
The method of claim 18, wherein said radiation sensitive material is diphenyliodonium chloride, diphenyliodonium hexafluoroarsenate(V) or triphenylsulfonium hexafluoroarsenate(V).
Claim 22
Dependent Claim
22 words
The method of claim 16, wherein said conductive polymer is polythiophene and said radiation sensitive materials are diphenyliodonium hexafluoroarsenate(V) or triphenylsulfonium hexafluoroarsenate(V).
Claim 23
Dependent Claim
21 words
The method of claim 16, wherein the element is a monolayer sheet of said conductive polymer containing said radiation sensitive material.
Claim 24
Dependent Claim
35 words
The method of claim 16, wherein the element is a laminated sheet comprising one layer of said conductive polymer and one layer of said radiation sensitive material, wherein both of the layers are in contact.
Claim 25
Dependent Claim
21 words
The method of claim 16, wherein a support layer is present on at least one side of said radiation detecting element.
Claim 26
Dependent Claim
12 words
The method of claim 16, wherein a variation in electrical conductivity results.
Claim 27
Dependent Claim
18 words
The method of claim 16, wherein a variation in light absorption properties results in a noticeable color change.
References Cited (Backward Citations)
US3729313A
Cited
US3954816A
Cited
US4066676A
Cited
US4051075A
Cited
US3988158A
Cited
US4011176A
Cited
US4033905A
Cited
US4046950A
Cited
US4093358A
Cited
US4285575A
Cited
US4460677A
Cited
US4505844A
Cited
US4519940A
Cited
US4618454A
Cited
US4610811A
Cited
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