E[MeV]   deltaE/E[68% containment half width]
10.0  0.773485466081
17.7402629852  0.359954657156
31.4716930389  0.231385577856
55.8316116333  0.176863487275
99.0467529297  0.140648290361
175.711532593  0.110333613366
311.716888428  0.0869735984682
552.99395752  0.0698905480495
981.025878906  0.0597573990159
1740.36572266  0.0534522281461
3087.45458984  0.0468742705257
5477.22558594  0.0395353526855
9716.7421875  0.0343154580666
17237.7558594  0.0309733191279
30580.234375  0.0289693405089
54250.140625  0.0283083393386
96241.171875  0.0288287011177
170734.375  0.0301118573387
302887.28125  0.0313186037877
537330.0  0.0321799762221
953237.5625  0.0382491911325
1691068.5  0.0620266060416
3000000.0  0.101158895948