Iridium-192 – Knowledge and References

Explore chapters and articles related to this topic

Quality and Inspection

Published in Paul W. McMullin, Jonathan S. Price, Sarah Simchuk, Special Structural Topics, 2018

X-ray is only one source of radiation used to make exposures. Iridium-192 and cobalt-60 gamma-ray sources are common radioactive isotopes used in industrial radiography. Cobalt-60 is a highly penetrating radiation source. It is used to radiograph thick sections of concrete and steels. Iridium-192 is most often used to radiograph structural welds. Structural welds, however, are seldom examined by radiography. The radiation these sources emit is dangerous to humans. Other work inside the safety perimeter must stop while RT is being conducted. For this reason, most structural welds are examined with ultrasonic testing.

Assessing the efficacy of non-destructive testing methods to detect pitting corrosion

View Article

Journal Information

Published in Nondestructive Testing and Evaluation, 2023

Yang Hou, Thunyaluk Pojtanabuntoeng, Mobin Salasi, Mariano Iannuzzi, James McKechnie

Radiographic examination of the pitted samples was carried out with gamma rays from Iridium 192. A direct digital detector array was used for radiographic image capturing. Detailed testing parameters are shown in Table 4. Due to the external nature of the pitting attack, the traditional tangential techniques are limited to high latitude, high effective energy radiographic sources (Gamma) rather than the high contrast X-ray sources. This leads to a loss of sensitivity, resulting in limited detection of the pits within the side wall and restricting the depth measurement in the tangential direction. For the detected pits, greyscale software algorithms were used to estimate the depths.