Re: [fluka-discuss]: Incorrect result

From: Francesco Cerutti <>
Date: Fri, 30 Nov 2018 16:50:30 +0100

Dear Jyoti,

first, note that you do not need a source routine for an isotropic
distribution, which is simply available through the BEAM card (WHAT(3)).

Second, what you score in the unit 21 is the energy *deposited* in your
detector made of *air* (GeV per emitted photon), while in unit 22 you get
a 3D distribution of energy density deposited in air (GeV/cm3 per emitted
photon). In principle there is nothing wrong in all that, the point is
what you want to compare to, and how you normalize the resulting number.

Kind regards


Francesco Cerutti
CH-1211 Geneva 23
tel. +41 22 7678962

On Thu, 29 Nov 2018, Jyoti wrote:

> Dear FLUKA experts
> I took a Co-60 point source at (0,0,0) and a spherical detector at 100 cm.
> Energy: 1.17 MeV, one photon
> Then I run the file, the result is not even close to the theoretical predicted value.
> Kindly find the source and input file attached.
> Please let me know the error.
> With Regards,
> Jyoti

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Received on Fri Nov 30 2018 - 18:12:09 CET

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