E[MeV]   deltaE/E[68% containment half width]
10.0  0.692472617772
17.7402629852  0.428864462284
31.4716930389  0.313115866427
55.8316116333  0.253282519669
99.0467529297  0.210722360509
175.711532593  0.174710998004
311.716888428  0.147474924195
552.99395752  0.122870969956
981.025878906  0.103938061091
1740.36572266  0.0912947113979
3087.45458984  0.0797869046446
5477.22558594  0.0686890677452
9716.7421875  0.0620516086379
17237.7558594  0.0598711427304
30580.234375  0.0603103704418
54250.140625  0.0629379273069
96241.171875  0.0684068962136
170734.375  0.0758906769721
302887.28125  0.0842478561018
537330.0  0.093861417591
953237.5625  0.117795985
1691068.5  0.174330618571
3000000.0  0.236006329919