A beam of X-rays is directed toward a thick gold sheet. Each X-ray photon in the beam has an energy of 2.21 keV, and the half-thickness of gold for 2.21 keV photons is 0.391 cm. What is the intensity of the beam, as a ratio of the initial intensity, once it has passed through 0.8 cm of the gold sheet? Give your answer to three decimal places.
Which of the following formulas correctly relates the half-thickness of a material, , to its linear attenuation coefficient, ?
Chromium has a density of 7,190 kg/m3. The mass attenuation coefficient for chromium for 1 keV X-rays is cm2/g. What is the linear attenuation coefficient of chromium for 1 keV X-rays? Give your answer to four decimal places.