Energy Distribution in a Graphite Sample (image) Kiel University Share Print E-Mail Caption Film recordings show for the first time how the energy distribution in a graphite sample changes in the ultrashort period of 50 femtoseconds. Credit © Phys. Rev. Lett Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.