I Solving Planar Fluence: Ratio of Electrons per cm2

AI Thread Summary
The discussion revolves around calculating the ratio of electron flux density when a broad beam of electrons interacts with a thin foil. The initial calculation suggests a flux density ratio of 1.06 with the foil present compared to when it is removed. Participants are questioning whether this ratio of electrons per cm² behind the foil should also be 1.06 and discussing the need for integral calculations over angular distributions to confirm this. There is mention of a reference text, "Introduction to Radiological Physics and Radiation Dosimetry" by Attix, which may provide insights into the observed increase in flux. The conversation highlights the complexities of electron scattering and the need for a deeper understanding of the underlying physics.
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.

Help¡
 
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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 excercise from the first chapter (the third excercise). The exercise gives the answers, and I don´t know why is the unity the particles ratio.
 

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