This lecture, in 2 parts, covers interaction of radiation with matter and includes fundamental interactions, particle ranges, dosimetry, and hot atom chemistry. Interaction of radiation with matter covers energy loss and reactions with charged particles and photons. The stopping power of charged particles in different material is covered, including calculations on energy loss with thickness. Electron backscattering is introduced with examples on different behavior with varied elements. Discussion on photon interaction includes photoelectric effect, Compton effect, and pair production. Units of dosimetry are described. Dosimetry measurements are discussed and quality factors based on particle mass and charge are introduced. Introductory dose calculations are supplied. Radiation protection regulations and the definition of terms (ALI, DAC) are given. A review of hot atom chemistry is given. Part 1 is 28 minutes, part 2 is 40 minutes. The lecture is assigned on Saturday 3 February and due Thursday 8 February. The answers to the Lecture 10 PDF quiz will be posted Friday 9 February.
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ReplyDeleteFor question 2, is Fe the upper or lower detection limit?
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ReplyDeleteI was wondering in question 2, if Fe is the detection limit for your instrument, does that mean you can detect anything bigger than Fe, including the compounds similar in size? Or can it only detect the compounds similar in size?
Thanks for your time
-Sarah
The question is really related to ability to detect elements. The method relies upon the electron interactions, which is proportional to the number of protons in the nucleus. So any element with more protons than Fe should be observable.
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