OXYGEN    12      24    36    48     60    72    84    96   108   120   132   144   156   168 

15.0    24.60  17.40  8.97  4.00   2.73  1.84  2.74  2.70  2.55  3.14  3.29  3.52  4.32  5.60 
20.0    51.40  23.10  8.65  3.36   2.42  2.39  2.86  2.55  2.23  2.10  2.82  4.10  5.45  6.80 
30.0    72.50  20.70  4.03  1.32   2.09  2.52  1.92  1.38  1.26  1.65  2.66  4.28  5.95  8.34 
50.0    35.10   3.68  0.61  1.05   1.02  0.62  0.31  0.12  0.22  0.47  0.99  2.11  3.57  4.90

cross sections in unit of 10-19 cm2/sr