(Solved): Q5, Chapter 9, Book: Attix Introduction to radiological physics and radiation dosimetry An im ...

Q5, Chapter 9, Book: Attix Introduction to radiological physics and radiation dosimetry

An imaginary pulsed $x$-ray machine spends $50\%$ of the pulse length at $T_0=$ $90\mathrm{keV}$ with a beam current of $i=15\mathrm{mA},25\%$ at $60\mathrm{keV}$ with $i=20\mathrm{mA}$, and $25\%$ at $40\mathrm{keV}$ with $i=10\mathrm{mA}$. (a) Graphically construct the time-averaged unfiltered bremsstrahlung spectrum in arbitrary units. (b) Calculate the attenuation in passing through $1\mathrm{mm}\mathrm{Cu}+2\mathrm{mm}\mathrm{Al}$, and draw the resulting filtered spectrum. (c) Redraw (b) as a photon fluence spectrum and as an exposure spectrum, normalizing to the same maximum ordinate value.