Energy Loss of Electrons passing through a Graphite Single Crystal at Different Incident Angles

The energy loss of 25 kev electrons when passed through a thin film of single graphite crystals at 0 and 45 deg was determined to be 6.8 plus or minus 0.2 ev at both angles. The result shows that the loss value does not depend on the incident angle THETA . The resonant energy between nearest neighbors in a lattice layer was estimated to be 1.6 ev. (C.J.G.)