We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
X-RAY EMISSION FROM THE METASTABLE COMPONENTS OF SLOW Ar<sup>16+</sup> BEAM ON METALLIC SURFACES.
- Authors
ZHANG, H. Q.; CHEN, X. M.; LIU, Z. Y.; YANG, Z. H.; XU, J. Z.; CUI, Y.; XU, X.; SHAO, J. X.; ZHANG, X. A.; ZHAO, Y. T.; ZHANG, Y. P.; XIAO, G. Q.
- Abstract
K-shell X-ray emission was observed in the neutralization process of Ar16+ interacting with beryllium and molybdenum at slow speed (less than Bohr velocity). The K-shell X-ray emission came from the metastable component of Ar16+ beam with the configuration (1s2s) produced from electron cyclotron resonance ion source. The intensity ratio of Kβ X-ray emission to Kα X-ray emission (IKβ/IKα) in the neutralization process decreased when the kinetic energy of the projectile increased. This is closely related to the flight time the projectiles spend above the surface, which is dominated by both the work function of the metal and the normal velocity component of the incident ions to the surface according to the classical over-barrier model. As the relation between IKβ/IKα and the above-flight time shows, the longer time above the surface the larger ratio due to the above-surface contribution. Furthermore, the smaller work function leads to the smaller contribution from the above surface.
- Subjects
METALLIC surfaces; SURFACES (Technology); BERYLLIUM; MOLYBDENUM; SURFACE chemistry; PHYSICAL &; theoretical chemistry
- Publication
Surface Review & Letters, 2009, Vol 16, Issue 3, p463
- ISSN
0218-625X
- Publication type
Article
- DOI
10.1142/S0218625X0901286X