E[MeV]   deltaE/E[68% containment half width]
10.0  0.77027915181
17.7402629852  0.434369538672
31.4716930389  0.310164853478
55.8316116333  0.278188764001
99.0467529297  0.256310993061
175.711532593  0.2208963859
311.716888428  0.192015979104
552.99395752  0.167216777318
981.025878906  0.149329824446
1740.36572266  0.144738112283
3087.45458984  0.14417558164
5477.22558594  0.137894424332
9716.7421875  0.135292870495
17237.7558594  0.139359395777
30580.234375  0.14802892567
54250.140625  0.158317190414
96241.171875  0.169268754271
170734.375  0.180466539843
302887.28125  0.190145699313
537330.0  0.197176381803
953237.5625  0.214150051828
1691068.5  0.257171695157
3000000.0  0.313573793986