Linear attenuation coefficient for gamma ray attenuation

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SUMMARY

The discussion focuses on calculating the linear attenuation coefficient (μ) for gamma rays using experimental data on count rates against material thickness. Participants confirm that plotting the natural logarithm of the count rate ratio (C/C0) against thickness is a valid method to derive μ. It is emphasized that separate plots should be made for each material, such as aluminum (Al), lead (Pb), and iron (Fe). The intensity value is not required for this calculation, simplifying the process for users.

PREREQUISITES
  • Understanding of gamma ray attenuation principles
  • Familiarity with logarithmic functions
  • Basic knowledge of plotting data using graphing tools
  • Experience with materials like aluminum, lead, and iron
NEXT STEPS
  • Research the mathematical derivation of the linear attenuation coefficient (μ)
  • Learn how to plot data using software like Python's Matplotlib
  • Explore the physical properties of materials affecting gamma ray attenuation
  • Investigate experimental methods for measuring gamma ray count rates
USEFUL FOR

Students in physics or engineering, researchers in radiation physics, and anyone involved in experimental setups for gamma ray attenuation studies.

adamworth
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Homework Statement



I have data for the count rate (of gamma rays) against the thickness of various materials (Al, Pb, Fe etc...).

I want to work out the linear attenuation coefficient. Can I do this by plotting the natural log of count rate against thickness? I don't have values for "intensity".

Homework Equations



I = I0e-ux

The Attempt at a Solution

 
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adamworth said:
Can I do this by plotting the natural log of count rate against thickness?
Yes. Be sure to make separate plots for each material. You don't need "Intensity" to figure out μ. Just plot the ratio C/C0 that is the ratio of counting rate at a given thickness to the counting rate without any absorber.
 
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