Dear fluka users,
In a simple example, I tried using USRTRACK and USRBIN to tally recoil proton produced by neutron in water.
I could got neutron and gamma fluence with USRBIN; neutron and gamma spectrum with USRTRACK.
But, I got zero results with proton in the water region. Was it reasonable? Or what was wrong with me?
The Manual says, Low-energy neutron transport is activated by option LOW-NEUT, recoil protons …are produced and transported explicitly.
What was wrong with me? Thanks a lot for your helps.
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TITLE
15-MeV (kinetic) NEUTRON in water
DEFAULTS PRECISIO
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BEAM -0.010 9.9 9.9 NEUTRON
BEAMPOS 0.0 0.0 -10.0
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GEOBEGIN COMBNAME
0 0 user's geometry title
* body define：
RPP body1 -500000.0 +500000.0 -500000.0 +500000.0 -500000.0 +500000.0
RPP body2 -100000.0 +100000.0 -100000.0 +100000.0 -100000.0 +100000.0
RPP body3 -5.0 +5.0 -5.0 +5.0 0.0 +15.0
END
* region define：
* External Black Hole
regBH1 5 +body1 -body2
* Vacuum
regVA2 5 +body2 -body3
* Water
regWT3 5 +body3
END
GEOEND
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MATERIAL 1.0 1.0007825 .0000899 26.0 0.0 0. M1001
LOW-MAT M1001 1. -2. 296. 0.0 0. HYDROGEN
MATERIAL 5.0 10.0129 2.34 27.0 0.0 0. M5010
LOW-MAT M5010 5. 10. 296. 0.0 0. BORON-10
MATERIAL 5.0 11.00931 2.34 28.0 0.0 0. M5011
LOW-MAT M5011 5. 11. 296. 0.0 0. BORON-11
MATERIAL 8.0 15.9949 .0001429 29.0 0.0 0. M8016
LOW-MAT M8016 8. 16. 296. 0.0 0. OXYGEN
MATERIAL 0.0 0.0 0.7271 30.0 0.0 0.0WATER1
COMPOUND 4.8624E-2 M1001 5.6099E-6 M5010 2.2723E-5 M5011WATER1
COMPOUND 2.4312E-2 M8016 WATER1
* Water
ASSIGNMAT WATER1 regWT3
* External Black Hole
ASSIGNMAT BLCKHOLE regBH1
* Vacuum
ASSIGNMAT VACUUM regVA2
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SCORE 8.0 1.0
USRBIN 12.0 8.0 30.0 3.0 0.0 0.0FlueneN1
USRBIN 1.0 0.0 0.0 1.0 1.0 1.0 &
USRBIN 12.0 1.0 31.0 3.0 0.0 0.0FlueneP1
USRBIN 1.0 0.0 0.0 1.0 1.0 1.0 &
USRBIN 12.0 7.0 32.0 3.0 0.0 0.0FlueneG1
USRBIN 1.0 0.0 0.0 1.0 1.0 1.0 &
USRTRACK 1.0 8.0 40.0 2.0 1.0 260.0SpecN1
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
USRTRACK 1.0 1.0 41.0 2.0 1.0 200.0SpecP1
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
USRTRACK 1.0 7.0 42.0 2.0 1.0 200.0SpecG1
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
USRTRACK 1.0 8.0 50.0 3.0 1.0 260.0SpecN2
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
USRTRACK 1.0 1.0 51.0 3.0 1.0 200.0SpecP2
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
USRTRACK 1.0 7.0 52.0 3.0 1.0 200.0SpecG2
USRTRACK 2.0E-2 0.0 0.0 0.0 0.0 0.0 &
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PART-THR -1.0E-4 1.0 8.0 1.0 0.0
LOW-NEUT 1.0 1.0
RANDOMIZE 1.0
DISCARD 3.0 4.0 5.0 6.0
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START 1.6E8
STOP
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Received on Thu Nov 06 2014 - 09:57:06 CET