Re: [fluka-discuss]: Percentage error too large

From: Celestine Onjewu Oche <oche.pg821497_at_st.futminna.edu.ng>
Date: Sat, 28 Sep 2019 17:31:56 +0100

Thanks, I'll check it out.
I used 5000 as my histories


On Fri, Sep 27, 2019, 8:17 PM Andrea Fontana <andrea.fontana_at_pv.infn.it>
wrote:

> Hi Celestine,
> how many histories did you run to get this output?
> The statistical error in depends on the number of primaries
> and of histories, according to the formula shown at pag. 42
> in this lecture:
>
>
> https://indico.cern.ch/event/694979/contributions/2927088/attachments/1657637/2654305/Fundamentals_of_MC_simulations_of_radiation_transport_2018.pdf
>
> Andrea
>
> Il 27/09/2019 20:51, Celestine Onjewu Oche ha scritto:
> > Pls see this...
> >
> > On Thu, Sep 26, 2019, 7:43 PM Celestine Onjewu Oche
> > <oche.pg821497_at_st.futminna.edu.ng
> > <mailto:oche.pg821497_at_st.futminna.edu.ng>> wrote:
> >
> > I scored recently energy deposition into a target of three layers
> > using the USRBIN detector. The result I got showed very large
> > percentage error (attachment 1). Pls what could be responsible for
> > this?
> > Also I'd love to know what this format stands for as described by
> > the arrow in attachment two. Thanks in advance.
> >
>
> --
> ========================================================================
> Dr. Andrea Fontana tel: +39 0382 987991
> Istituto Nazionale fax: +39 0382 423241
> di Fisica Nucleare
> Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
> Via Bassi 6 web : www.pv.infn.it/~fontana
> 27100 PAVIA, Italy
> ========================================================================
>
>


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Received on Sat Sep 28 2019 - 20:08:40 CEST

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