Standard Test Method for Determining the Size of Iridium-192, Cobalt-60, and Selenium-75 Industrial Radiographic Sources

Importancia y uso:

4.1 One of the factors affecting the quality of a radiographic image is geometric unsharpness. The degree of geometric unsharpness is dependent upon the 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 or digital detector. This test method allows the user to determine the size of the source and to use this result to establish source to object and object to film or detector distances appropriate for maintaining the desired degree of geometric unsharpness.

Note 1: The European standard CEN EN 12579 describes a simplified procedure for measurement of source sizes of Ir-192, Co-60, and Se-75. The resulting source size of Ir-192 is comparable to the results obtained by this test method.

Subcomité:

E07.01

Referida por:

E2033_E2033M-24

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

Cobalt 60; Iridium 192; radiographic source; reference sample; Selenium 75; source size;