Trajectory dependent energy loss in grazing collisions of keV He atoms from a LiF(001) surface

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 315; pp. 30 - 35
• Main Authors: Lienemann, J., Hülsewede, D., Seifert, J., Maass, K., Busch, M., Winter, H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2013
• Subjects: Charge exchange; Charge transfer; Collisions; Electron emission; Grazing; Insulator surface; Ion scattering; Projectiles; Rainbow scattering; Rainbows; Scattering; Trajectories; Rainbow scattering; Insulator surface; Electron emission; Ion scattering
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2013.02.055

Angular distributions for scattering of 12keV He atoms from a LiF(001) surface under a grazing angle of incidence were recorded in coincidence with the projectile energy loss and the number of electrons emitted from the target surface during the collision. For scattering along the low indexed 〈110〉 and 〈100〉 directions of the crystal surface collisional rainbow peaks were observed. For scattering along a 〈110〉 direction the resulting rainbow peaks can be attributed to scattering from strings of anions which form active sites for charge exchange and emission of electrons. The data can be interpreted by trajectory computer simulations where charge transfer takes place from F− sites.