mcnp
c --------------------------cell card-------------------------------
c neutron generator
10       0           -100                             imp:n,p=1  $sourccell
11       0            100 -101                        imp:n,p=1  $inner vaccum
12       1 -7.874000  101 -102                        imp:n,p=1  $iron case
c Polyethylene 
20       2 -1.000000  102 -200                        imp:n,p=1
c Tungsten block 
30       3 -19.300000 -300                            imp:n,p=1
c NaI detector
40       5 -3.667000 -400                             imp:n,p=1
c Target 
50       6 -1.720000 -500                             imp:n,p=1
c Air
90       9 -0.001205 -999 #10 #11 #12 #20 #30 #40 #50   imp:n,p=1
c void
999     0             999                            imp:n,p=0

c ------------------------surface card-------------------------------
c neutron generator
100     rcc 7.89 0 11  2 0 0       0.5            $source
101     rcc 1 0 11     15.78 0 0   2.25           $source inner
102     rcc 0 0 11     17.78 0 0   3.25           $source outer
c Polyethylene
200     rpp 0 17.78     -11 11     0 22
c Tungsten block
300     rpp 4.19 13.59    -5.55 5.55    22 36.9
c NaI detector
400     rpp 2.285 15.495    -6.605 6.605    65.355 78.565
c Target
500     rpp 38.215 60.845     -11.315 11.315    0 22
c void
999     s   30.4225 0 39.2825    200

c ----------------------------data card-------------------------------
c ----------------------------Material--------------------------------
c Iron, -7.874000
m1      26000 -1.000000
c Polyethylene, Borated, -1.000000
m2      1001 -0.125355 6000 -0.774645
c Tungsten, -19.300000
m3      74000 -1.000000
c Uranium, HEU, U.S. Average, -18.724760
c m4      92234 -0.009800 92235 -0.931550 92236 -0.004500 92238 -0.054150
c Sodium Iodide, -3.667000
m5      11023 -0.153373 53127 -0.846627
c Explosive Compound, AN, NH4NO3, -1.720000
m6      1001 -0.050370 7014 -0.349978 8016 -0.599652 
c Hydrongen -0.000084
c m7      1001 -1.000000 
c Air (Dry, Near Sea Level), -0.001205
m9      6000 -0.000124  7014 -0.755268 8016 -0.231781
        18000 -0.012827
c
c -----------------------------sdef card------------------------------
mode n p
phys:n  100 0 0 J J J 0 -1 1 J J 0 0
sdef    pos=8.89 0 11 cel=10 par=n erg=14 vec=1 0 0 dir=d1
si1     h 0.9653 1                                         
sp1     d 0 1
f8:p    40
e8      0 1e-5 10000i 14                           $interest region of energy
ft8     geb 0.0169069 0.0480868 0.4545339                  
nps     1e10