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

15.0    39.1  32.30  13.10  6.60  2.40  2.10  2.10  1.90  2.20  2.50  2.80  3.30  4.90  6.00 
20.0   136.0  40.00  10.00  2.90  2.90  2.00  1.80  2.00  2.00  1.20  1.60  3.00  4.60  6.00 
30.0   150.0  32.80   3.10  1.40  1.67  1.82  1.16  0.87  0.89  0.76  1.43  2.78  3.97  5.82 
50.0   121.0   6.10   1.30  1.60  1.10  0.70  0.30  0.14  0.30  0.60  1.02  1.45  1.89  2.50 

cross sections in unit of 10-20 cm2/sr