Unit of differential scattering cross section

[Doan Le]

Dear all,

I have a naïve question on the unit of differential scattering cross section and hope you can help. I am wondering if the unit of differential scattering cross section is unit of area (ex.  nm^2 ) / unit of a solid angel (steradian)? I suppose it can not be the unit of area only cuz it is defined as the derivative of the total scattering cross section with respect to the solid angle. 

Below is one of the result from the example 3 in the tutorials, where differential cross section as a function of theta is shown (I guess phi = 0).

 

Many thanks,

Doan  

[Amos Egel]

Dear Doan,

yes, your assumption about the unit of the differential cross section is correct (length unit squared divided by steradian).

The figure is a plot of the differential cross section integrated along the azimuth angle and not a slice at phi=0.

Best regards, Amos

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[Doan Le]

Thanks Amos

Vào lúc 13:12:26 UTC+2 ngày Thứ Sáu, 5 tháng 8, 2022, amos...@gmail.com đã viết: