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Standard Test Method for Determining the Focal Size of Iridium-192 Industrial Radiographic Sources
STANDARD published on 10.3.2003
Designation standards: ASTM E1114-03
Note: WITHDRAWN
Publication date standards: 10.3.2003
SKU: NS-40481
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
cylinder(s), focal size, iridium 192, radiographic source, reference sample, sphere, ICS Number Code 19.100 (Non-destructive testing)
Significance and Use | ||||||||||||
One of the factors affecting the quality of a radiographic image is geometric unsharpness. The degree of geometric unsharpness is dependent upon the focal size of the source, the distance between the source and the object to be radiographed, and the distance between the object to be radiographed and the film. This test method allows the user to determine the focal size of the source and to use this result to establish source to object and object to film distances appropriate for maintaining the desired degree of geometric unsharpness. |
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1. Scope | ||||||||||||
1.1 This test method covers the determination of the focal size of an iridium-192 radiographic source. The determination is based upon measurement of the image of the iridium metal source in a projection radiograph of the source assembly and comparison to the measurement of the image of a reference sample in the same radiograph. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||
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