Re: Meaning of primary weight in USRBIN

From: Alfredo Ferrari (alfredo.ferrari@cern.ch)
Date: Tue Sep 13 2005 - 22:56:18 CEST

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    Hi Brandon

    "per unit primary weight" means "per unit primary particle statistical
    weight", and in all problems where primary particles are equally weighted
    (the vast majority of problems) it is is simply "per primary particle"

    It has nothing to do with physical weight

    I hope it is clear now!

                         Alfredo

    On Tue, 13 Sep 2005, Reddell, Brandon D wrote:

    >
    > All,
    >
    > In the FLUKA2003 manual in the USRBIN section it says:
    >
    > "Energy deposition will be expressed in GeV per cm3 per unit
    > primary weight. To obtain doses (in Gy per unit primary
    > weight),
    > the results must be multiplied by (1.602176462E-7 / rho),
    > where
    > rho is the material density in g/cm3."
    >
    > So what exactly does primary weight mean? Does this imply that the
    > conversion from GEV/cm3/g to Gy is really Gy/(actual detector volume)?
    >
    > Brandon
    >
    >

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