Radiographic Testing Lead Foil Intensification Factor
The lead foil intensifying factor increases the film blackening effectiveness of gamma rays through secondary electrons. This shortens the required exposure time and improves inspection accuracy.
Physical-Chemical Working Principle
Lead foils convert part of the incoming gamma ray energy into secondary electrons. These electrons can darken film and increase radiation density, thus enhancing blackening effectiveness.
Metallurgical Relevance & Welding Risks
The intensifying factor improves the accuracy of radiographic inspections. However, an excessive dose can damage the material or impair its mechanical properties. It is important to respect the maximum permissible dose.
Shop Practice & Procedures
Use lead foils with an intensifying factor of at least 2:1 for optimal blackening effects. Make sure not to exceed the maximum permissible exposure time (typically 30 minutes). Use appropriate protective clothing and safety measures when handling gamma radiation.