Discussion Overview
The discussion revolves around the application of the Bethe formula to calculate the stopping power (dE/dx) of a particle as it traverses a material. Participants are focusing on unit conversions and specific terms within the formula, particularly the delta term.
Discussion Character
- Technical explanation
- Mathematical reasoning
- Homework-related
Main Points Raised
- One participant expresses confusion regarding the units in the Bethe formula, specifically questioning how to convert the term involving (e^2/4PiEpsilon) from J*m to MeV*cm.
- Another participant suggests that the Wikipedia formula may be suspicious and recommends consulting the particle data book for potentially more reliable coefficients.
- A participant seeks clarification on how to determine the appropriate value for the delta term in the equation, particularly in the context of high-energy scenarios.
- It is noted that the delta term is defined in a specific section of the particle data book, and that its effect is minimal for \beta\gamma values less than 10.
Areas of Agreement / Disagreement
Participants do not appear to reach a consensus on the reliability of the Wikipedia formula versus the particle data book, and there is ongoing uncertainty regarding the delta term and its implications.
Contextual Notes
Participants reference specific sections of the particle data book for definitions and coefficients, indicating that the discussion may depend on these external resources for clarity on certain terms.
Who May Find This Useful
Individuals interested in particle physics, particularly those working on calculations involving particle interactions with matter and the Bethe formula.