This is my first mcnp file$标题
C Cell card
101 1 -3.76 -101 
102 0 101 -102
103 0 102
 
C Surface card
101 RCC 0 0 0 0 0 7.5 3.75
102 SO 20
 
C data card
MODE P E
imp:p 1 1 0
imp:e 1 1 0
M1 11000 1 53000 1
SDEF POS=0 0 -1 ERG=0.661
F28:P,E 101
E28 0 0.001 510I 1
F18:P,E 101
E18 0 0.001 510I 1
FT18 GEB 0 0.0567 0
NPS 1000000
PRINT