Question (2) of Fe is the characteristic X-rays emitted Kα1 radiation when one of the electrons in L shell falls into the vacancy produced by knocking an electron out of the K-shell, and its wavelength is 0.1936 nm. Find the energy difference related to this process for X-ray emission? Sol. Consider the process in which an L shell electron moves to the vacancy created in the K shell of the target (Fe) by collision with highly accelerated electrons from a filament. The wavelength of the photon released in this process is given by , also use λ (with frequency ν). We of (6.626 *10_34 Js) . Energy per photon is given by Planck’s constant h E= hν= hc/λ number NA( 0.6022 * 1024), one can obtain the Using Avogadro’s energy difference related to the X-ray release process per mole of Fe. ΔE = NA h c / ΔE λ = 6.1979 *108 J/mole ΔE Question (3) There is a substance of linear absorption coefficient. (1) Obtain a simple relation to give the sample thickness x required to reduce the amount of transmitted X-ray intensity by half. (2) Calculate also the corresponding thickness of Fe-17 mass % Cr alloy .density( D= 7.76 * 106 g/m3 ) for Mo-K˛ radiation. x = 0.693/µ
Question (2) Kα1 radiation of Fe is the characteristic X-rays emitted when one of the electrons in L shell falls into the vacancy produced by knocking an electron out of the K-shell, and its wavelength is 0.1936 nm. Find the energy difference related to this process for X-ray emission? Sol. Consider the process in which an L shell electron moves to the vacancy created in the K shell of the target (Fe) by collision with highly accelerated electrons from a filament. The wavelength of the photon released in this process is given by λ , (with frequency ν). We also use Planck’s constant h of (6.626 *10_34 Js) . Energy per photon is given by E= hν= hc/λ Using Avogadro’s number NA( 0.6022 * 1024), one can obtain the energy difference ΔE related to the X-ray release process per mole of Fe. ΔE = NA h c / λ ΔE = 6.1979 *108 J/mole Question (3) There is a substance of linear absorption coefficient. (1) Obtain a simple relation to give the sample thickness x required to reduce the amount of transmitted X-ray intensity by half. (2) Calculate also the corresponding thickness of Fe-17 mass % Cr alloy .density( D= 7.76 * 106 g/m3 ) for Mo-K˛ radiation. x = 0.693/µ
pubdoc_12_16979_1444.docx