Discussion Overview
The discussion centers on the search for a graph depicting the attenuation coefficient of Gold (Au) as a function of photon energy, specifically from approximately 10^-3 to 10^4 MeV. Participants are interested in understanding the types of interactions (such as incoherent, photoelectric, and Compton scattering) that occur at various energy levels, particularly in the context of comparing Gold to other elements like lead and iron.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant requests a graph for the attenuation coefficient of Gold, noting difficulty in finding relevant data.
- Another participant provides a link to a resource for the attenuation coefficient of Gold, but mentions it only covers up to 10^2 MeV and lacks details on interaction types.
- Some participants suggest that the interaction regions for Gold and lead will be similar due to their close atomic numbers (Z=79 for Gold and Z=82 for lead).
- There is a discussion about the K-edge shift and the idea that at certain energy levels, photons interact with the atomic structure in a way that may not exhibit significant chemical effects.
- A later reply expresses gratitude for the provided information and shares a specific application regarding the use of gold nanoparticles in tumor treatments with MeV photons.
Areas of Agreement / Disagreement
Participants generally agree that the interaction regions for Gold and lead are likely similar due to their atomic numbers, but there is no consensus on the specifics of the attenuation coefficient graph for Gold or the detailed interactions at various energies.
Contextual Notes
The discussion does not resolve the limitations of the available data, such as the lack of comprehensive graphs for Gold at higher energies or the specific types of interactions occurring at different energy levels.