American Society for Nondestructive Testing (ASNT) Radiographic Testing Practice Test

Question: 1 / 400

What characteristic of target material produces the best x-ray efficiency?

Low atomic number

Medium atomic number

High atomic number

The characteristic of target material that produces the best x-ray efficiency is a high atomic number. Materials with a high atomic number have a greater density and more electrons, which increases the likelihood of interactions with incoming electrons during the x-ray production process. This higher interaction probability leads to a larger number of x-rays being generated when the target material is struck by an electron beam, thereby enhancing the efficiency of x-ray production.

Additionally, high atomic number materials tend to produce x-rays with higher energy, which can penetrate thicker materials effectively, making them particularly useful in industrial radiography and medical imaging applications. Therefore, the use of high atomic number materials, such as lead or tungsten, provides significant advantages in generating high-quality x-ray images while maximizing efficiency.

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Variable atomic number

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