E[MeV]   deltaE/E[68% containment half width]
10.0  0.647761355879
17.7402629852  0.279333986983
31.4716930389  0.218674029355
55.8316116333  0.194046742633
99.0467529297  0.178654165574
175.711532593  0.154934558481
311.716888428  0.131777595189
552.99395752  0.112192637675
981.025878906  0.0979093856627
1740.36572266  0.0861631124224
3087.45458984  0.0755382735083
5477.22558594  0.0677796475067
9716.7421875  0.0647226697182
17237.7558594  0.065133331493
30580.234375  0.0664875044512
54250.140625  0.0712695830755
96241.171875  0.0781316069466
170734.375  0.0860523385685
302887.28125  0.0946240627222
537330.0  0.10509062524
953237.5625  0.130213815639
1691068.5  0.188400157146
3000000.0  0.247388915656