Photon Interaction Coefficients of Helium

List of coefficients in cm2/g

   #    E(keV)       Total     Photoelect  Compton     Coherent    Pair
                   attenuation absorption  scattering  scattering  production

   1   1.0000E-01  5.4000E+04  5.4000E+04  1.2800E-04  4.0000E-01  0.0000E+00 
   2   1.5000E-01  1.8874E+04  1.8874E+04  2.4597E-04  4.0013E-01  0.0000E+00 
   3   2.0000E-01  8.5899E+03  8.5899E+03  4.4265E-04  3.9922E-01  0.0000E+00 
   4   3.0000E-01  2.6900E+03  2.6900E+03  9.8677E-04  3.9835E-01  0.0000E+00 
   5   4.0000E-01  1.1247E+03  1.1247E+03  1.7359E-03  3.9744E-01  0.0000E+00 
 
   6   5.0000E-01  5.6692E+02  5.6692E+02  2.6960E-03  3.9551E-01  0.0000E+00 
   7   6.0000E-01  3.1609E+02  3.1609E+02  3.8276E-03  3.9256E-01  0.0000E+00 
   8   8.0000E-01  1.2512E+02  1.2414E+02  6.6873E-03  3.8665E-01  0.0000E+00 
   9   1.0000E+00  6.0827E+01  6.0438E+01  1.0169E-02  3.7870E-01  0.0000E+00 
  10   1.5000E+00  1.6761E+01  1.6385E+01  2.1350E-02  3.5462E-01  0.0000E+00 
 
  11   2.0000E+00  6.8645E+00  6.5042E+00  3.4861E-02  3.2544E-01  0.0000E+00 
  12   3.0000E+00  2.0069E+00  1.6806E+00  6.3643E-02  2.6270E-01  0.0000E+00 
  13   4.0000E+00  9.3294E-01  6.3703E-01  8.9491E-02  2.0643E-01  0.0000E+00 
  14   5.0000E+00  5.7667E-01  3.0482E-01  1.1025E-01  1.6159E-01  0.0000E+00 
  15   6.0000E+00  4.1950E-01  1.6535E-01  1.2616E-01  1.2799E-01  0.0000E+00 
 
  16   8.0000E+00  2.9331E-01  6.1837E-02  1.4722E-01  8.4255E-02  0.0000E+00 
  17   1.0000E+01  2.4759E-01  2.9203E-02  1.5933E-01  5.9054E-02  0.0000E+00 
  18   1.5000E+01  2.0916E-01  7.3347E-03  1.7227E-01  2.9549E-02  0.0000E+00 
  19   2.0000E+01  1.9604E-01  2.7518E-03  1.7573E-01  1.7558E-02  0.0000E+00 
  20   3.0000E+01  1.8384E-01  6.8728E-04  1.7498E-01  8.1773E-03  0.0000E+00 
 
  21   4.0000E+01  1.7631E-01  2.5653E-04  1.7137E-01  4.6852E-03  0.0000E+00 
  22   5.0000E+01  1.7030E-01  1.1954E-04  1.6716E-01  3.0257E-03  0.0000E+00 
  23   6.0000E+01  1.6512E-01  6.4079E-05  1.6294E-01  2.1109E-03  0.0000E+00 
  24   8.0000E+01  1.5619E-01  2.4013E-05  1.5497E-01  1.1939E-03  0.0000E+00 
  25   1.0000E+02  1.4860E-01  1.1260E-05  1.4782E-01  7.6582E-04  0.0000E+00 
 
  26   1.5000E+02  1.3365E-01  2.8827E-06  1.3330E-01  3.4123E-04  0.0000E+00 
  27   2.0000E+02  1.2242E-01  1.1176E-06  1.2223E-01  1.9213E-04  0.0000E+00 
  28   3.0000E+02  1.0643E-01  3.0828E-07  1.0634E-01  8.5429E-05  0.0000E+00 
  29   4.0000E+02  9.5347E-02  1.3032E-07  9.5299E-02  4.8055E-05  0.0000E+00 
  30   5.0000E+02  8.7069E-02  6.9736E-08  8.7039E-02  3.0768E-05  0.0000E+00 
 
  31   6.0000E+02  8.0545E-02  4.3271E-08  8.0524E-02  2.1365E-05  0.0000E+00 
  32   8.0000E+02  7.0756E-02  2.1801E-08  7.0744E-02  1.2018E-05  0.0000E+00 
  33   1.0000E+03  6.3620E-02  1.3583E-08  6.3613E-02  7.6913E-06  0.0000E+00 
  34   1.0220E+03  6.2943E-02  1.2479E-08  6.2936E-02  7.3633E-06  0.0000E+00 
  35   1.2500E+03  5.6882E-02  8.5188E-09  5.6872E-02  4.9229E-06  0.0000E+00 
 
  36   1.5000E+03  5.1726E-02  6.2289E-09  5.1697E-02  3.4184E-06  2.6405E-05 
  37   2.0000E+03  4.4221E-02  3.9600E-09  4.4114E-02  1.9228E-06  1.0583E-04 
  38   3.0000E+03  3.5027E-02  2.2448E-09  3.4710E-02  8.5459E-07  3.1606E-04 
  39   4.0000E+03  2.9491E-02  1.5542E-09  2.8948E-02  4.8071E-07  5.4322E-04 
  40   5.0000E+03  2.5768E-02  1.1854E-09  2.5006E-02  3.0768E-07  7.6153E-04 
 
  41   6.0000E+03  2.3069E-02  9.5705E-10  2.2102E-02  2.1365E-07  9.6698E-04 
  42   7.0000E+03  2.1016E-02  8.0193E-10  1.9860E-02  1.5693E-07  1.1556E-03 
  43   8.0000E+03  1.9400E-02  6.8984E-10  1.8070E-02  1.2018E-07  1.3297E-03 
  44   9.0000E+03  1.8101E-02  6.0513E-10  1.6610E-02  9.4968E-08  1.4904E-03 
  45   1.0000E+04  1.7030E-02  5.3878E-10  1.5392E-02  7.6913E-08  1.6386E-03 
 
  46   1.2000E+04  1.5369E-02  4.4189E-10  1.3466E-02  5.3412E-08  1.9028E-03 
  47   1.5000E+04  1.3632E-02  3.4785E-10  1.1392E-02  3.4184E-08  2.2391E-03 
  48   2.0000E+04  1.1835E-02  2.5683E-10  9.1447E-03  1.9228E-08  2.6899E-03 
  49   2.2000E+04  1.1337E-02  2.3245E-10  8.4932E-03  1.5888E-08  2.8435E-03 
  50   2.6000E+04  1.0568E-02  1.9529E-10  7.4536E-03  1.1377E-08  3.1149E-03 
 
  51   3.0000E+04  1.0006E-02  1.6836E-10  6.6577E-03  8.5459E-09  3.3484E-03 
  52   4.0000E+04  9.1142E-03  1.2528E-10  5.2900E-03  4.8071E-09  3.8241E-03 
  53   5.0000E+04  8.6082E-03  9.9737E-11  4.4159E-03  3.0768E-09  4.1923E-03 
  54   6.0000E+04  8.2957E-03  8.2841E-11  3.8050E-03  2.1365E-09  4.4907E-03 
  55   8.0000E+04  7.9501E-03  6.1882E-11  3.0001E-03  1.2015E-09  4.9500E-03 
 
  56   1.0000E+05  7.7846E-03  4.9380E-11  2.4900E-03  7.6883E-10  5.2946E-03 
  57   1.5000E+05  7.6477E-03  3.2814E-11  1.7739E-03  3.4168E-10  5.8738E-03 
  58   2.0000E+05  7.6344E-03  2.4569E-11  1.3905E-03  1.9228E-10  6.2439E-03 
  59   3.0000E+05  7.6839E-03  1.6355E-11  9.8563E-04  8.5429E-11  6.6983E-03 
  60   4.0000E+05  7.7424E-03  1.2253E-11  7.7184E-04  4.8056E-11  6.9707E-03 
 
  61   5.0000E+05  7.7947E-03  9.7977E-12  6.3898E-04  3.0753E-11  7.1556E-03 
  62   6.0000E+05  7.8366E-03  8.1622E-12  5.4706E-04  2.1365E-11  7.2896E-03 
  63   8.0000E+05  7.9019E-03  6.1190E-12  4.2729E-04  1.2014E-11  7.4746E-03 
  64   1.0000E+06  7.9465E-03  4.8943E-12  3.5146E-04  7.6883E-12  7.5950E-03 
  65   1.5000E+06  8.0211E-03  3.2619E-12  2.4554E-04  3.4168E-12  7.7755E-03 
 
  66   2.0000E+06  8.0649E-03  2.4464E-12  1.9003E-04  1.9228E-12  7.8748E-03 
  67   3.0000E+06  8.1153E-03  1.6294E-12  1.3212E-04  8.5429E-13  7.9832E-03 
  68   4.0000E+06  8.1498E-03  1.2226E-12  1.0198E-04  4.8055E-13  8.0479E-03 
  69   5.0000E+06  8.1689E-03  9.7796E-13  8.3382E-05  3.0753E-13  8.0854E-03 
  70   6.0000E+06  8.1833E-03  8.1502E-13  7.0699E-05  2.1365E-13  8.1126E-03 
 
  71   8.0000E+06  8.2032E-03  6.1115E-13  5.4480E-05  1.2014E-13  8.1486E-03 
  72   1.0000E+07  8.2157E-03  4.8898E-13  4.4475E-05  7.6883E-14  8.1713E-03 
  73   1.5000E+07  8.2306E-03  3.2589E-13  3.0738E-05  3.4168E-14  8.1998E-03 
  74   2.0000E+07  8.2415E-03  2.4449E-13  2.3637E-05  1.9228E-14  8.2179E-03 
  75   3.0000E+07  8.2507E-03  1.6294E-13  1.6294E-05  8.5429E-15  8.2345E-03 
 
  76   4.0000E+07  8.2575E-03  1.2223E-13  1.2512E-05  4.8056E-15  8.2450E-03 
  77   5.0000E+07  8.2627E-03  9.7781E-14  1.0189E-05  3.0753E-15  8.2525E-03 
  78   6.0000E+07  8.2641E-03  8.1487E-14  8.6121E-06  2.1365E-15  8.2555E-03 
  79   8.0000E+07  8.2666E-03  6.1115E-14  6.6035E-06  1.2014E-15  8.2600E-03 
  80   1.0000E+08  8.2684E-03  4.8883E-14  5.3728E-06  7.6883E-16  8.2630E-03