Hello！I would like to ask a few questions regarding the Gryzinsky cross-section！

[uvwatshu]

Thank you very much for sharing the code related to electron beam trajectory simulation. It has been very insightful and helpful for my research! However, I have a few questions regarding some of the parameters used in the code.

In the formula for calculating the Gryzinsky cross-section, it seems that EB represents the average binding energy. However, in the code, it appears that the binding energy used is Esi for the i-th layer. Does this difference have a significant impact on the calculation? Which value should I be using for this calculation?

Additionally, I am considering adding a material, PMMA (C5H8O2), to the simulation. Could you kindly advise on how I can find its binding energy? I have not been able to locate this information online, and I would appreciate your guidance on where you found the binding energy values.

Lastly, I noticed that some articles simulate the Gryzinsky cross-section for both the L layer and the valence band layer. Is the L layer referring to the 1s shell here, and is the valence band layer equivalent to the p shell in the code? I would appreciate it if you could confirm whether my understanding is correct.

Thank you in advance for your time and help! I look forward to your response.