Question

With the aid of a labeled sketch, describe an apparatus for the generation of x-rays. [2] (b) With the aid of labeled sketches, describe the three primary physical mechanisms for the absorption of x-rays in solids. [2] (c) Make a sketch of a typical x-ray spectrum generated by a hospital apparatus, labeling three primary features of the spectrum. [2] (d) For an x-ray apparatus containing a molybdenum target of atomic number, z = 42: (i) What is the wavelength for the shortest characteristic x-ray emission? You may use the relationship for the energy of a quantum state, E_n = -13.6eV(z-1)^2/n^2 where z is the atomic number of an element, n is the quantum state number where n = 1 represents the ground state. [2] (ii) Where the accelerating potential is 60 keV, what is the minimum wavelength of emission? [1] (iii) If the accelerating potential is increased, explain whether the wavelengths of the K? and K? lines increase, decrease, or remain the same?

Answer 1