Difference between revisions of "Electron transmission radiography"
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== Description == | == Description == | ||
| − | A radiographic technique that uses secondary electrons emitted from a thin lead foil (100 to 250 micrometers) to produce an image of the examined object on a radiographic film. Electron transmission radiography is conducted by placing a flat object in intimate contact with the emulsion side of a single coated radiographic or photographic film. The lead foil intensifying screen is then placed on the other side of the object. A radiotransparent weight or vacuum is applied to press the layers together and minimize air gaps which deteriorate the image quality. A high energy industrial X-ray generator (200-400 kV) is used to irradiate the lead foil causing it to emit low energy electrons (through photoelectric effect and/or Compton effect) which in turn pass through the object and expose the film. The film is less sensitive to the high energy X-rays that pass through the object. This technique can be used when beta radiography is not available. | + | A radiographic technique that uses secondary electrons emitted from a thin lead foil (100 to 250 micrometers) to produce an image of the examined object on a radiographic film. Electron transmission radiography is conducted by placing a flat object in intimate contact with the emulsion side of a single coated radiographic or photographic film. The lead foil intensifying screen is then placed on the other side of the object. A radiotransparent weight or vacuum is applied to press the layers together and minimize air gaps which deteriorate the image quality. A high energy industrial X-ray generator (200-400 kV) is used to irradiate the lead foil causing it to emit low energy electrons (through photoelectric effect and/or Compton effect) which in turn pass through the object and expose the film. The film is less sensitive to the high energy X-rays that pass through the object. This technique can be used when [[beta radiography]] is not available. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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electron radiography; radiographie par electrons secondaires (Fr.); Sekunderelektronenradiographie (Deut.); radiografia de electrões secundarios (Port.) | electron radiography; radiographie par electrons secondaires (Fr.); Sekunderelektronenradiographie (Deut.); radiografia de electrões secundarios (Port.) | ||
| − | == | + | == Resources and Citations == |
| − | + | * D.Kushel, "Radiographic Methods Used in the Recording of Structure and Watermarks in Historic Papers" | |
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| + | * H.Tomimasu, D.Kim, P.Luner, M.Suk, "Comparison of Four Paper Imaging techniques: Beta Radiography, Electrography, Light Transmission and Soft X-radiography" ''TAPPI Journal'', 74(7):165-175, 1991. | ||
| + | * C.Bridgman, "The Radiography of Paper" ''Studies in Conservation'', 10(1):8-17, 1965. | ||
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| + | * D. Schnitger, "Radiographie mit Elektronen aus Metallverstärkerfolien - Darstellung der Radiographie mit Fotoelektronen aus Metallverstärkerfolien als zerstörungsfreies Prüfverfahren für dünne organische Werkstoffe. Forschungsbericht 103, BAM Berlin, ISBN 3-88314-328-6 | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 09:45, 29 October 2020
Description
A radiographic technique that uses secondary electrons emitted from a thin lead foil (100 to 250 micrometers) to produce an image of the examined object on a radiographic film. Electron transmission radiography is conducted by placing a flat object in intimate contact with the emulsion side of a single coated radiographic or photographic film. The lead foil intensifying screen is then placed on the other side of the object. A radiotransparent weight or vacuum is applied to press the layers together and minimize air gaps which deteriorate the image quality. A high energy industrial X-ray generator (200-400 kV) is used to irradiate the lead foil causing it to emit low energy electrons (through photoelectric effect and/or Compton effect) which in turn pass through the object and expose the film. The film is less sensitive to the high energy X-rays that pass through the object. This technique can be used when Beta radiography is not available.
Synonyms and Related Terms
electron radiography; radiographie par electrons secondaires (Fr.); Sekunderelektronenradiographie (Deut.); radiografia de electrões secundarios (Port.)
Resources and Citations
- D.Kushel, "Radiographic Methods Used in the Recording of Structure and Watermarks in Historic Papers"
- H.Tomimasu, D.Kim, P.Luner, M.Suk, "Comparison of Four Paper Imaging techniques: Beta Radiography, Electrography, Light Transmission and Soft X-radiography" TAPPI Journal, 74(7):165-175, 1991.
- C.Bridgman, "The Radiography of Paper" Studies in Conservation, 10(1):8-17, 1965.
- D. Schnitger, "Radiographie mit Elektronen aus Metallverstärkerfolien - Darstellung der Radiographie mit Fotoelektronen aus Metallverstärkerfolien als zerstörungsfreies Prüfverfahren für dünne organische Werkstoffe. Forschungsbericht 103, BAM Berlin, ISBN 3-88314-328-6