Dear Fluka users,
In my problem,
Oxygen-17 ions 0.004 GeV/u irradiate LiF thin target for detecting
17O(7Li,t)21Ne reaction cross section (alpha Transfer reaction) with
7.5MeV
populated in 7Li.
I need energy
spectrum of Neon-21 in the angle range of 0~3 degree of beam direction.
So, I
used USRBDX and USRYIELD to score energy of 21Ne at the 0~3 direction. But
the
result was so frustrating. According to calculation result of two body
kinematics, 21Ne energy peak should have been around 63 and 25 MeV
respectively. But In the fluka simulation, the energy peak was
corresponding to
around 43 MeV. I tried to change many cards but the result didn?t change.
are there physics cards that I missed or did I put wrong input?
What cards do I need more for 17O(7Li,t)21Ne reaction?
It is direct, transfer and inelastic two body reaction.
My input is below
---------------------------------------------------------------------
#if 0
TITLE
c1
#endif
* Set the defaults for precion simulations
DEFAULTS PRECISIO
* Define the beam characteristics
* WARNING: Beam Energy/momentum per nucleon
BEAM -0.004- 1.035E-4 -0.1 -0.1
HEAVYION
* Ion Definition
HI-PROPE 8. 17. 0.0
* Define the beamposition
BEAMPOS 0.0 0.0 -0.1
GEOBEGIN COMBNAME
0 0
SPH blkbody 0.0 0.0 0.0 2.
* Void sphere
SPH void 0.0 0.0 0.0 1.
* 1 PZ 0
XYP S1 0.0
* 2 PZ 3.795E-005
XYP S2 1.333E-05
* 3 PZ 5.1282E-005
XYP S3 5.1282E-05
* 4 PY 0.4
XZP S4 0.4
* 5 PY -0.4
XZP S5 -0.4
* 6 PX 0.4
YZP S6 0.4
* 7 PX -0.4
YZP S7 -0.4
END
* Black hole
BLKBODY 5 +blkbody-void
VOID 5 +( +S1 | -S3 | -S4 | +S5 | -S6 | +S7 ) +void
C1 5 -S1 +S2 +S4 -S5 +S6 -S7
C2 5 -S2 +S3 +S4 -S5 +S6 -S7
END
GEOEND
MATERIAL 3. 0.534 7.
LITHIUM
MATERIAL 9. 0.001696 19.
FLUORINE
MATERIAL 2.635 LF
COMPOUND 1. LITHIUM 1. FLUORINE LF
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7..
ASSIGNMA BLCKHOLE BLKBODY
ASSIGNMA VACUUM VOID
ASSIGNMA CARBON C1 C1
ASSIGNMA LF C2 C2
PHYSICS 2.
EM-DISSO
* Set thresholds for pair/bremsstrahlung
PAIRBREM 3. 0.0001 HYDROGEN _at_LASTMAT
IONTRANS HEAVYION
USRBDX 101. HEAVYION -23. C2 VOID
bdxang
USRBDX 0.065 0.023 420. 1.5708 90. &
DELTARAY HYDROGEN
AUXSCORE USRBDX -2101000. bdxang bdxang
* Set the random number seed
RANDOMIZ 1.
BME
* Set the number ofprimary histories to be simulated in the run
START 100000000.
STOP
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Received on Wed Jan 29 2020 - 11:25:56 CET