CAMRT Radiography Practice Exam

Which of the following is a characteristic of Tungsten that increases x-ray production?

1. Low atomic number

2. High atomic number

3. Low melting point

4. High thermal resistance

The correct answer is: High atomic number

Tungsten is known for its high atomic number, which is one of the key factors that contribute to increased x-ray production. The high atomic number means that tungsten has a greater number of protons in its nucleus, which leads to a higher probability of interactions between the incoming electrons (during the x-ray generation process) and the tungsten atoms. This results in a more efficient production of x-rays due to enhanced Bremsstrahlung radiation and characteristic radiation. In addition to the atomic number, tungsten's other properties, such as its high melting point and thermal resistance, also support its use in x-ray tubes. These characteristics allow tungsten to withstand the intense heat generated during x-ray production without melting or degrading, which is critical for maintaining consistent and reliable x-ray output. However, the high atomic number is specifically what directly enhances the x-ray production efficiency. On the other hand, options that mention low atomic number or low melting point do not contribute positively to x-ray production. A low atomic number would result in fewer x-ray photons being generated due to reduced interaction capabilities with electrons, and a low melting point could lead to structural failures under the heat generated during x-ray production. Hence, the high atomic number of tungsten is pivotal in maximizing the efficiency of