ASTM-E1114 Historical Revision Information
Standard Test Method for Determining the Focal Size of Iridium-192 Industrial Radiographic Sources

ASTM-E1114 - 2003 EDITION - SUPERSEDED
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Standard Test Method for Determining the Size of Iridium-192, Cobalt-60, and Selenium-75 Industrial Radiographic Sources
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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.

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.

Keywords

cylinder(s); focal size; iridium 192; radiographic source; reference sample; sphere; ICS Number Code 19.100 (Non-destructive testing)

To find similar documents by ASTM Volume:

03.03 (Nondestructive Testing)

To find similar documents by classification:

19.100 (Non-destructive testing Including testing equipment: industrial apparatus for X-ray and gamma radiography, penetrant flaw detectors, etc. Non-destructive testing of welded joints, see 25.160.40 Industrial radiographic films, see 37.040.25 Non-destructive testing of metals, see 77.040.20)

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Document Number

ASTM-E1114-03

Revision Level

2003 EDITION

Status

Superseded

Modification Type

Revision

Publication Date

March 10, 2003

Document Type

Test Method

Page Count

5 pages

Committee Number

E07.01