[Fwd: Re: material CsI]

From: Sebastien WURTH (wurth@ipno.in2p3.fr)
Date: Wed Feb 13 2008 - 12:42:20 CET

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    Hello,

    I think it is in the definition of Cs and I : SDUMs of material cards
    must be CESIUM and IODINE for linking to the neutron X-sections (please
    look at the manual, chapter 10 "low energy neutrons in fluka").

    Hope it helps.
    Regards.
    Sebastien.

    Jiasen Ma a wrote :

    >Dear All,
    >
    >When I run fluka on a detector of caesium iodide(CsI), Fluka
    >seems to stop the physics process. At the end of the output
    >file, there is this message:
    >
    > **** Low energy neutron xsec not found for some media 0 2 ****
    > I
    > Cs
    >
    >If there are no certain physics paramters available for low
    >energy neutron interaction for CsI, can I tell Fluka to bypass
    >this but still do the full simulation for other parts of the
    >detector? (I need better neutron simulation for other
    >materials than CsI) Or something else is wrong?
    >
    >I have a simple input card attached. It's also possible I made
    >a stupid mistake in the material definition.
    >
    >Thanks a lot and thanks for your previous responses to my
    >questions.
    >
    >Jiasen
    >
    >
    >------------------------------------------------------------------------
    >
    >TITLE
    >Particle production from 12-GeV (KE) protons on a Pt target
    >*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
    >GLOBAL 1.0
    >DEFAULTS PRECISION
    >SOURCE 1.0 1.0 13.0 pt13_
    >BEAM 15.0 NEUTRON
    >PHYSICS 1000. 1000. 1000. 1000. 1000. 1000. PEATHRESH
    >*EMF OFF
    >*LOW-BIAS 1.0
    >*LOW-MAT 26.0 74. -2. 293. TUNGSTEN
    >*LAM-BIAS 1.0E+10 13. 16. 1.GDECAY
    >*
    >GEOBEGIN COMBINAT
    > 0 0 A simple Pt target inside vacuum
    >SPH BlakHole 0.0 0.0 0.0 3000.0
    >SPH World 0.0 0.0 0.0 2000.0
    >RCC CSITG 0.0 0.0 550.0 0.0 0.0 600.0 100.0
    >END
    >R1bh 2 +BlakHole -World
    >R2World 2 +World -CSITG
    >RCSITG 2 +CSITG
    >END
    >GEOEND
    >*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
    >MATERIAL 53.0 126.900 1.9300 26.00 I
    >MATERIAL 55.0 132.910 7.1400 27.00 Cs
    >MATERIAL 0.0 0.0000 4.53 28.00 CSI
    >COMPOUND 1.0 26.0 1.0 27.00 CSI
    >*
    >ASSIGNMAT 1.0 1.0
    >ASSIGNMAT 2.0 2.0
    >***MB(vac is with world)
    >ASSIGNMAT 28.0 3.0
    >*
    >*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
    >* e+e- and gamma production threshold set at 10 MeV
    >*EMFCUT -0.010 0.010 1.0 12.0 PROD-CUT
    >* Boundary crossing current in the middle of the target (log intervals, one-way)
    >USRBDX 1.0 201.0 47.0 4.0 2.0 1. CurrUD
    >USRBDX +15.0 +15.0 0.0 &
    >USRBDX 1.0 201.0 47.0 6.0 2.0 1. CurrUD
    >USRBDX +15.0 +15.0 0.0 &
    >* Call MGDRAW
    >USERDUMP 101.0 2. prod
    >*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
    >RANDOMIZE 1.0 128352042.
    >*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
    >START 200000.0
    >STOP
    >
    >


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