geometry rectangular

volume
     5.500000E-01    zone_0
     4.500000E-01    zone_1
     2.000000E-01    zone_2
     3.000000E-01    zone_3
     5.000000E-01    zone_4
     1.500000E-01    zone_5
     8.000000E-01    zone_6
     5.500000E-01    zone_7
     4.500000E-01    zone_8
end

mat_loading
    zone_0    fake_mat
    zone_1    water
    zone_2    fake_mat
    zone_3    water
    zone_4    helium
    zone_5    fake_mat
    zone_6    fake_mat
    zone_7    fake_mat
    zone_8    water
end

mixture fake_mat
    material fake_mat 1 1
end

mixture water
    material water 1 1
end

mixture helium
    material helium 1 1
end

