1. Stair‐step particle flux spectra on the lunar surface: Evidence for nonmonotonic potentials?. Issue 1 (11th January 2017) Authors: Collier, Michael R.; Newheart, Anastasia; Poppe, Andrew R.; Hills, H. Kent; Farrell, William M. Journal: Geophysical research letters Issue: Volume 44:Issue 1(2017) Page Start: 79 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗