Your O-18 elemental material has no low energy neutron cross sections
associated. You need the LOW-MAT card to associate to it an existing
set from the material list reported in the chapter 10 of the manual,
keeping however in mind that a dedicated set for O-18 is not available, so
neutrons below 20 MeV will be transported in O-18 as if their nuclear
interactions were occurring in O-16 (in case you select the OXYGEN set).
Best
Francesco
On Tue, 20 Oct 2015, Dong-Gun jang wrote:
>
> We want to simulate cyclotron with H2O(18-O water) target by using Flair.
>
>
>
> However, the simulation doesn't work. Although we edited 18-O to Materials.
>
>
>
> If you know the reason, Please give me the answer.
>
>
>
> Thanks.
>
>
>
>
>
>
>
> TITLE
> Liquid Target
> GLOBAL 10000.
> DEFAULTS NEW-DEFA
> BEAM -16.5 -0.8 -1.7 PROTON
> BEAMPOS 1.9 0.4 3.5
> GEOBEGIN COMBNAME
> 0 0 Target
> * al
> RCC al 1.90 1.40 3.70 0.00 -0.40 0.00 2.60
> * al2
> RCC al2 1.90 3.40 3.70 0.00 -2.00 0.00 1.30
> * al2hole
> RCC al2hole 1.90 3.40 3.70 0.00 -2.00 0.00 0.75
> * alhole
> RCC alhole 1.90 1.40 3.70 0.00 -0.40 0.00 0.75
> * bev1
> RPP bev1 -0.90 4.70 3.40 4.00 0.90 6.50
> * bev1h
> RCC bev1h 1.90 4.00 3.70 0.00 -0.60 0.00 0.75
> * bev2
> RCC bev2 1.90 8.80 3.70 0.00 -4.80 0.00 1.65
> * bev2h
> RCC bev2h 1.90 8.80 3.70 0.00 -4.80 0.00 0.85
> * blk
> SPH blk 1.90 8.00 3.70 100.00
> * chamber
> RPP chamber -0.90 4.70 11.70 13.20 0.90 6.50
> * f
> RCC f 1.90 10.70 3.70 0.00 -1.90 0.00 1.13
> * fh
> RCC fh 1.90 10.70 3.70 0.00 -1.90 0.00 0.75
> * gra
> RPP gra 0.00 3.80 0.00 1.00 0.00 7.40
> * grahole
> RCC grahole 1.90 1.00 3.70 0.00 -1.00 0.00 1.00
> * h25
> RPP h25 0.55 3.25 10.70 10.700025 2.35 5.05
> * h50
> RPP h50 0.55 3.25 11.69995 11.70 2.35 5.05
> * hava25
> RPP hava25 0.55 3.25 10.70 10.700025 2.35 5.05
> * hava50
> RPP hava50 0.55 3.25 11.69995 11.70 2.35 5.05
> * rear
> RPP rear -3.10 6.90 13.20 15.20 0.90 6.50
> * silver
> RPP silver 0.55 3.25 11.70 12.50 2.35 5.05
> * tarbox
> RPP tarbox 0.55 3.25 11.70 12.50 2.35 5.05
> * vac
> RPP vac -0.90 4.70 10.70 11.70 0.90 6.50
> * vach
> RCC vach 1.90 11.69995 3.70 0.00 -0.999925 0.00 1.00
> * vacu
> RCC vacu 1.90 11.69995 3.70 0.00 -0.999925 0.00 1.00
> * void
> SPH void 1.90 8.00 3.70 30.00
> * wabox
> RCC wabox 1.90 12.10 3.70 0.00 -0.40 0.00 0.80
> * water
> RCC water 1.90 12.10 3.70 0.00 -0.40 0.00 0.80
> END
> * Reg # 1
> * bk; assigned material: Blackhole; mat # (1)
> bk 5 +blk -void
> * Reg # 2
> * VOID; assigned material: Blackhole; mat # (1)
> VOID 5 +void -( +gra -grahole ) -( +al -alhole ) -(+al2 -al2hole ) -( +bev1 -bev1h
> ) -(+bev2-bev2h
> ) -( +f -fh ) -( +vac -vach-h25 -h50 ) -hava25 -hava50 -vacu -( +chamber
> -tarbox ) -(
> +silver -wabox ) -water -rear
> * Reg # 3
> * R_grap; assigned material: Blackhole; mat # (1)
> R_grap 5 +( +gra -grahole )
> * Reg # 4
> * R_coll2; assigned material: Blackhole; mat # (1)
> R_coll2 5 +( +al2 -al2hole )
> * Reg # 5
> * R_BEV1; assigned material: Blackhole; mat # (1)
> R_BEV1 5 +( +bev1 -bev1h )
> * Reg # 6
> * R_BEV2; assigned material: Blackhole; mat # (1)
> R_BEV2 5 +( +bev2 -bev2h )
> * Reg # 7
> * R_front; assigned material: Blackhole; mat # (1)
> R_front 5 +( +f -fh )
> * Reg # 8
> * R_vac; assigned material: Blackhole; mat # (1)
> R_vac 5 +( +vac -vach -h25 -h50 )
> * Reg # 9
> * R_hava25; assigned material: Blackhole; mat # (1)
> R_hava25 5 +hava25
> * Reg # 10
> * R_hava50; assigned material: Blackhole; mat # (1)
> R_hava50 5 +hava50
> * Reg # 11
> * R_vacu; assigned material: Blackhole; mat # (1)
> R_vacu 5 +vacu
> * Reg # 12
> * R_chamber; assigned material: Blackhole; mat # (1)
> R_chambe 5 +( +chamber -tarbox )
> * Reg # 13
> * R_sil; assigned material: Blackhole; mat # (1)
> R_sil 5 +( +silver -wabox )
> * Reg # 14
> * R_water; assigned material: Blackhole; mat # (1)
> R_water 5 +water
> * Reg # 15
> * R_rear; assigned material: Blackhole; mat # (1)
> R_rear 5 +rear
> * Reg # 16
> * R_coll; assigned material: Blackhole; mat # (1)
> R_coll 5 +( +al -alhole )
> END
> GEOEND
> MATERIAL 6. 2.26 Graphite
> MATERIAL 24. 7.18 CHROMIUM
> MATERIAL 25. 7.21 MANGANES
> MATERIAL 27. 8.9 COBALT
> MATERIAL 42. 10.22 MOLYBDEN
> * 470 Havar
> * see Porter, NIM 89 (1970) 237; Goodfellow (via Google)
> * 0.04% Be contribution omitted
> MATERIAL 8.3 Havar
> COMPOUND -0.2 CARBON -20.0 CHROMIUM -1.6 MANGANESHavar
> COMPOUND -17.46 IRON -42.5 COBALT -13.0 NICKELHavar
> COMPOUND -2.4 MOLYBDEN -2.8 TUNGSTEN Havar
> MATERIAL 8. 0.001429 18.O-18
> * 18O-water
> *
> MATERIAL 1.0 NewMat
> COMPOUND 2.0 HYDROGEN 1.0 O-18 NewMat
> ASSIGNMA BLCKHOLE bk
> ASSIGNMA AIR VOID
> ASSIGNMA Graphite R_grap
> ASSIGNMA ALUMINUM R_coll2
> ASSIGNMA ALUMINUM R_BEV1
> ASSIGNMA ALUMINUM R_BEV2
> ASSIGNMA ALUMINUM R_front
> ASSIGNMA ALUMINUM R_vac
> ASSIGNMA Havar R_hava25
> ASSIGNMA Havar R_hava50
> ASSIGNMA VACUUM R_vacu
> ASSIGNMA ALUMINUM R_chambe
> ASSIGNMA SILVER R_sil
> ASSIGNMA NewMat R_water
> ASSIGNMA ALUMINUM R_coll
> ASSIGNMA ALUMINUM R_rear
> RESNUCLE 3. -61. R_hava25 Havar25
> RESNUCLE 3. -62. R_hava50 Havar50
> RANDOMIZ 1.
> START 1000.0
> STOP
>
>
>
> [XLN32sP6CFpr7ZFPPS9EQw00][_at_from=bluejdg&rcpt=fluka%2Ddiscuss%40fluka%2Eorg&msgid=%3C20151020110631%2EHM%2Ec00000000064H4
> y%40bluejdg%2Ewwl1477%2Ehanmail%2Enet%3E]
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Received on Tue Oct 20 2015 - 10:14:55 CEST