RE: copper bombarded by 10 MeV proton

From: Helmut Vincke <Helmut.Vincke_at_cern.ch>
Date: Wed, 9 Jun 2010 09:09:12 +0200

Hi

You run without default settings. That means the NEW-Def settings are
used.

The particle transport threshold for protons is set at 10 MeV, meaning
you start your protons and kill them immediately.

I propose to use a lower particle threshold for protons. One way to do
so is the use of Default Precision settings (100 keV).
Details for Defaults:
http://www.fluka.org/fluka.php?id=man_onl&sub=21

Cheers
Helmut

-----Original Message-----
From: owner-fluka-discuss_at_mi.infn.it
[mailto:owner-fluka-discuss_at_mi.infn.it] On Behalf Of
biyuanjie_at_tsinghua.org.cn
Sent: Mittwoch, 9. Juni 2010 04:41
To: fluka-discuss_at_fluka.org
Subject: copper bombarded by 10 MeV proton

Dear all,

I want to record the total number of neutrons from copper bombarded by
proton of different energy. I find from Exfor that the cross sections of
cu65(p,n)zn65 is not zero,
but when I do simulation with fluka, no neutron is emitted. Below is my
input file, could somebody give me some help

Thanks
Yuanjie

*
..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
TITLE Cu collimator 72 MeV proton
*
..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
BEAM -0.01 -0.0 -0.0 -0.0 -0.0
PROTON
BEAMPOS 0.0 0.0 0.0
GEOBEGIN COMBNAME
    0 0 A Cu collimator
RPP body1 -5000000.0 +5000000.0 -5000000.0 +5000000.0 -5000000.0
+5000000.0
RPP body2 -1000000.0 +1000000.0 -1000000.0 +1000000.0 -100.0
+1000000.0
RCC elli 0.0 0.0 1. 0.0 0.0 0.024 0.3
END
* black hole
regBH1 5 +body1 -body2
* vacuum around
regVA2 5 +body2 -elli
regIn 5 +elli
END
GEOEND
* External Black Hole
ASSIGNMA BLCKHOLE regBH1
* Vacuum
ASSIGNMA VACUUM regVA2
ASSIGNMA COPPER regIn
LOW-NEUT 260.
USRBIN 10. NEUTRON -60. 3. 3.
3.fie
USRBIN -3. -3. 0.0 30. 1. 30.&
* Boundary crossing fluence in the middle of the target (log intervals,one-way)
USRBDX 101. NEUTRON -47.0 regIn regVA2
1.0piFluenUD
USRBDX 0.1 0.0 100. &
* Boundary crossing current in the middle of the target (log intervals,one-way)
USRBDX 1. NEUTRON -48. regIn regVA2
1.0piCurrUD
USRBDX 0.1 0.0 100. &
*
..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
RANDOMIZ 1.0
*
..+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
START 1000000.0 0.0
STOP
Received on Wed Jun 09 2010 - 09:59:35 CEST

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