Difference between revisions of "Gamma radiation"
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== Description == | == Description == | ||
| − | Very high energy | + | Very high energy electromagnetic radiation: energy range from some keV to some MeV, i.e. wavelengths in the range of 0.15 - 0.005 nm. Gamma radiation, first named by Ernest Rutherford in 1903, are emitted during radioactive decay processes of certain radioisotopes. They penetrate matter deeply.In the cultural heritage area, gamma radiation have been used for non destructive examination of objects by gamma radiography (mainly using iridium 192 or cobalt 60) and in some cases of conservation-preservation processes to kill insects, fungi, molds or bacteria infecting cultural heritage artfacts collections using the radiation emitted by intense sealed sources (cobalt 60). |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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== Hazards and Safety == | == Hazards and Safety == | ||
| − | Gamma radiation may polymerize resins and decrease mechanical strength of paper. | + | Exposition to gamma radiation is dangerus for the human health. Gamma radiation may polymerize resins and decrease mechanical strength of organic materials like paper, plastics, canvas... |
== Authority == | == Authority == | ||
Revision as of 10:18, 18 August 2013
Description
Very high energy electromagnetic radiation: energy range from some keV to some MeV, i.e. wavelengths in the range of 0.15 - 0.005 nm. Gamma radiation, first named by Ernest Rutherford in 1903, are emitted during radioactive decay processes of certain radioisotopes. They penetrate matter deeply.In the cultural heritage area, gamma radiation have been used for non destructive examination of objects by gamma radiography (mainly using iridium 192 or cobalt 60) and in some cases of conservation-preservation processes to kill insects, fungi, molds or bacteria infecting cultural heritage artfacts collections using the radiation emitted by intense sealed sources (cobalt 60).
Synonyms and Related Terms
gamma rays; rayonnement gamma (Fr.); photon gamma (Fr.); Gamma Strahlung (Deut.); radiazione gamma (It.); radiação gama (Port.); radiacion gamma (Esp.)
Hazards and Safety
Exposition to gamma radiation is dangerus for the human health. Gamma radiation may polymerize resins and decrease mechanical strength of organic materials like paper, plastics, canvas...
Authority
- G.Caneva, M.P.Nugari, O.Salvadori, Biology in the Conservation of Works of Art, ICCROM, Rome, 1991
- Encyclopedia Britannica, http://www.britannica.com Comment: "gamma ray." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service. 9 Nov. 2004 .
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998