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0001 // Define a parameter for later use
0002 :P Z_HALF_LENGTH 2.5*cm
0003
0004 // Define materials
0005 :ELEM Hydrogen H 1. 1.
0006 :ELEM Oxygen O 8 16.
0007 :MIXT Water 1. 2
0008 Hydrogen 2./18.
0009 Oxygen 16./18.
0010
0011 // Define rotation matrix
0012 :ROTM R00 0. 0. 0. // unit matrix
0013
0014 // Define volumes and place them
0015 :VOLU world BOX 100. 100. 100. G4_AIR
0016
0017 :VOLU "my box" BOX 50. 50. 50. G4_AIR
0018 :PLACE "my box" 1 world R00 0. 0. $Z_HALF_LENGTH
0019
0020 :VOLU Chamber BOX 5.*cm 5.*cm $Z_HALF_LENGTH Water
0021 :PLACE Chamber 1 "my box" R00 0. 0. -$Z_HALF_LENGTH
0022 :PLACE Chamber 2 "my box" R00 0. 0. $Z_HALF_LENGTH
0023