Solving Planar Fluence: Ratio of Electrons per cm2

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SUMMARY

The discussion focuses on calculating the ratio of electron flux density through a plane parallel to a thin foil, specifically when the foil is present versus when it is removed. The calculated flux density ratio is 1.06, and participants seek clarification on whether the ratio of electrons per cm² behind the foil also equals 1.06. The conversation references "Introduction to Radiological Physics and Radiation Dosimetry" by Attix, highlighting the importance of angular distribution in determining these ratios.

PREREQUISITES
  • Understanding of electron beam physics
  • Knowledge of flux density concepts
  • Familiarity with angular distribution in scattering
  • Basic calculus for integral calculations
NEXT STEPS
  • Study the principles of electron scattering in thin foils
  • Learn about flux density calculations in particle physics
  • Explore angular distribution functions in radiation physics
  • Review exercises from "Introduction to Radiological Physics and Radiation Dosimetry" by Attix
USEFUL FOR

Physicists, radiation safety professionals, and students studying electron interactions and scattering phenomena in materials.

AgusCF
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Hello everyone,

Suppose a situation where you have a broad plane-parallele beem of electrons which is perpendiculary incident upon a thin foil which scatters the e- for an angle X. I did calculus and the ratio of flux density below the foil respect with the foil remove is 1.06. But, What are the ratio of the number of e- per cm2 passing through a plane just behind (and parallel to) the foil to what with the foil removed? I thing the ratio must be 1.06, also.

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A sketch would help.
AgusCF said:
But, What are the ratio of the number of e- per cm2 passing through a plane just behind (and parallel to) the foil to what with the foil removed?
Shouldn't this be the result of an integral over the angular distribution?

Why does your flux increase?
 
As I saw in Introduction to Radiological Physics and Radiation Dosimetry - Attix, these is an event that happens when you are working with a broad beam. Is an exercise from the first chapter (the third exercise). The exercise gives the answers, and I don´t know why is the unity the particles ratio.