Identify the most likely interaction for 100-keV photon in aluminum (Z=13)
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Transcribed Image Text:**Identify the most likely interaction for a 100-keV photon in aluminum (Z=13)**
In determining the most probable interaction of a 100-keV photon with aluminum, considering its atomic number (Z) of 13 is essential. Generally, photon interactions with matter include the photoelectric effect, Compton scattering, and pair production.
- **Photoelectric Effect**: Predominant at lower photon energies and in higher Z materials. It involves the complete absorption of the photon, resulting in the ejection of an electron from the atom.
- **Compton Scattering**: More likely in the intermediate energy range (a few keV to several MeV) and is relatively independent of the atomic number. It involves the photon scattering off an outer shell electron and transferring part of its energy to the electron.
- **Pair Production**: Occurs at energies above 1.022 MeV and is not significant at 100 keV.
For a photon of 100 keV in aluminum, Compton scattering is the most likely interaction due to the energy range and the medium's atomic number.
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