Final answer:
The statement that absorption efficiency refers to the efficiency of x-ray photon capture by detectors is true. X-rays with greater energy have a higher probability of interacting with materials via the Compton effect, influencing image quality and absorption efficiency.
Step-by-step explanation:
The statement that absorption efficiency refers to how efficiently x-ray photons are captured by the detectors is True. Absorption efficiency is a critical factor in medical imaging and radiographic testing, as it influences the quality of the resultant images. In the context of x-ray physics, as x-ray energy increases, the Compton effect becomes more significant, causing x-rays to scatter when they collide with outer electron shells, which modifies the x-ray's energy and direction. Factors such as the density and thickness of the material, as well as its atomic number, can affect the likelihood of x-rays being absorbed or scattered.
Furthermore, different mediums, like low-energy x-rays, provide better image contrast but have higher attenuation rates. Contrast can be enhanced by using substances with a higher atomic number, like barium or iodine, due to their ability to absorb x-rays more readily. Radiation detectors, such as photographic film, photomultiplier tubes, and CCD cameras, are designed to make use of these interactions, converting the incoming x-ray photons into a detectable signal or image.