ASNT Industrial Radiography Radiation Safety Practice Test

What is the specific gamma ray constant for Co-60?

1. 5.3 R/h at 1 ft

2. 14 R/h

3. 0.2 R/h

4. 156 R/h

The correct answer is: 14 R/h

The specific gamma ray constant for Co-60 is critical in understanding its radiation characteristics and how it is handled in various applications, particularly in industrial radiography. The correct value is 14 R/h, which refers to the exposure rate at a distance of 1 meter from a source of cobalt-60. This value is useful because it helps radiographers predict the levels of radiation exposure they might encounter near a Co-60 source. Understanding the specific gamma ray constant allows for the effective implementation of safety protocols and exposure limits, thereby ensuring that personnel are adequately protected while conducting radiographic inspections. The 14 R/h measurement signifies the intensity of gamma radiation emitted by Co-60, providing a baseline for dose calculations and shielding requirements in practical situations. This comprehension of the specific gamma ray constant is part of a broader understanding of radiation safety, emphasizing the significance of accurate knowledge regarding radioactive materials and their handling in industrial environments.