Diffraction data of helium and hydrogen atoms through polycrystalline graphene

Image data and radial traces calculated from image data recorded by a CMOS camera recording the phosphor screen of a MCP stack showing diffraction patterns of hydrogen and helium atoms diffracted through polycrystalline graphene. The kinetic energy of the projectile atoms was varied between 254 and 1581 eV. This energy was measured by measuring the energy of the ion beam prior to neutralization by applying a retarding potential to a Faraday Cup. Those measurements are also provided.