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IRIDIUM 192 DOWNLOAD
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IRIDIUM 192 LICENSE
You may not remove or obscure the copyright notice or other notices contained in the ASTMĪSTM grants you a limited, non-transferable license as follows: This is not a sale all right, title and interest in the ASTM Document (in both electronic file You (Licensee) have no ownership or other rights in the ASTM Document. This document is copyrighted by the ASTM International (ASTM), 100īarr Harbor Drive, West Conshohocken, PA 19428-2959 USA.Īll rights reserved. Please click here to view License Agreement for Educational Institutions. If you do not agree to the terms of this License Agreement, promptly exit this page This License Agreement, that you understand it and that you agree to be bound by its IMPORTANT-READ THESE TERMS CAREFULLY BEFORE DOWNLOADING THIS DOCUMENT.īy downloading the ASTM Document you are entering into a contract, and acknowledge that The relatively short half-life of iridium 192, 74.4 days (5), while a disadvantage, can be overcome by arranging for replacement of the source at 70- to 90-day intervals, with re-irradiation of the source, if feasible, after a suitable decay period. With such small, intense sources, radiographs can be made very rapidly, and a fiuoroscopic screen can be illuminated adequately through considerable thicknesses of material, since short source-to-film and source-to-screen distances can be used without sacrificing definition.
In addition, the high absorption of thermal neutrons by iridium facilitates the rapid preparation of sources of high specific activity, high total activity, and small physical size. The most intense components are at about 305 and 467 kv, and the relatively low energies of the gamma rays simplify the protection problems and make possible the safe and convenient use of multicurie sources. The gamma ray spectrum of iridium 192, with energies between 200 and 600 kv, makes it a more useful source for the radiography of thin sections of steel than either radium or cobalt 60. Interest in the use of iridium 192 for radiography and fluoroscopy has been growing steadily during the past year on this continent and in Europe (1, 2, 3, 4).
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