Scattered Radiation
Stray radiation is the deflection of X-rays or gamma rays by matter, which reduces image contrast and must be minimized by collimators or filters.
Physikalisch-chemischer Wirkmechanismus
X-rays or gamma rays interact with the atoms of the materials. The rays can be deflected (scattered), which reduces their intensity and decreases image contrast in radiographs.
Metallurgical Relevance & Welding Risks
When checking weld quality with radiography, scattered radiation can lead to a blurrier image. This makes it harder to detect and locate small defects or pores. Insufficiently filtered radiation can also damage the welding equipment or endanger the operator's safety.
Werkstattpraxis & Handlungsanweisungen
Use collimators or filters with appropriate thickness to reduce scattered radiation. The filter thickness depends on the radiation energy used. For typical X-rays (50 kV), a filter of at least 1 mm aluminum or 2 mm lead is recommended. Make sure the welding equipment is regularly checked and calibrated to ensure image quality is not compromised.