c     Created on: Saturday, July 29, 2006 at 15:18
    1   276   -18.9 -1 
    2   252  -11.35 -2 1 
    3   204 -0.001225 -3 2 
    4     0         3 
    5     0         4 5 -8 -6 7 

    1        so 50 
    2        so 100 
    3        so 5000 
    4        px 1 
    5        pz 1 
    6        py 220 
    7        py -220 
    8       c/y 0 0 220 

mode  n
m204  7014.60c      -0.755636  $air (US S. Atm at sea level)
      8016.60c      -0.231475 18000.59c     -0.012889 
m252  82206.60c     -0.242902  $lead
      82207.60c     -0.223827 82208.60c      -0.53327 
m276  92234.60c   -5.408e-005  $Uranium (natural)
      92235.60c      -0.00711 92238.60c    -0.9928359 
imp:n             1 2r                      0            1  $ 1, 5