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Forum: Physics List
Re: None range cut for very thin layers (ahmet ayan)
Re: None Re: range cut for very thin layers (Vladimir IVANTCHENKO )
Re: None Re: range cut for very thin layers (Ahmet Ayan)
Re: None Re: range cut for very thin layers (michel maire)
Date: 17 Apr, 2006
From: Ahmet Ayan <ayanas@mail.med.upenn.edu>

Hi Michel, I looked at the PhotonProcesses example. I replaced the medium to Tungsten and varied the thickness of it as I shot 140keV gammas. For thicknesses greater than 1cm or so the calculated attenuation coefficients match well with the known (NIST) values. However as I go down on thicknesses, <1.*mm , I do not get the known (NIST) values.

I,then tried to calculate it by simplying using the "Nb of incident particles surviving the absorber" which given in this example code by the usual I/Io = e^(-mu . t), t=thickness.

I still cannot reproduce mu for tungsten.

Am I doing/interpreting something wrong here?

Thanks, Ahmet.

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1 None: Re: range cut for very thin layers   (michel maire - 18 Apr, 2006)
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