ASNT Radiographic Testing Practice Test 2025 – Comprehensive All-in-One Guide for Exam Success!

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What is the term used to express radioactivity per unit weight, typically in curies?

Activity concentration

Specific activity

The term used to express radioactivity per unit weight is known as specific activity. This measurement provides a way to quantify how much radioactivity is present in a given mass of a radioactive substance, typically expressed in units like curies per gram. Specific activity is significant in radiological assessments, as it helps in understanding the potency and potential hazards associated with radioactive materials.

This concept is particularly important in fields such as nuclear medicine, radiochemical research, and waste management, where knowing the specific activity can influence safety protocols and regulatory compliance. Specific activity allows professionals to determine the appropriate handling and disposal methods for different radioactive materials based on their radioactivity levels relative to their mass.

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Radioactive intensity

Mass activity

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