L-shell X-ray production of molybdenum and niobium induced by 1500–3500keV Xe26+ ions

Guo, Yu; Yang, Zhenhua; Zhang, Song; Xu, Qiumei; Chen, Jing; Yang, Bojun

doi:10.1016/j.nimb.2012.11.061

Cited by 3 publications

(1 citation statement)

References 21 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At higher kinetic energies in the MeV range, projectile and target approach closer, rendering side-feeding processes more efficient [68,69]. Still, molybdenum L-shell x-ray emission seems to be suppressed for kinetic energies below 350 keV of highly charged xenon ions [70][71][72] impinging on a molybdenum target, suggesting a reduced side-feeding efficiency. In the present work, kinetic energies well below 350 keV are used and corresponding distances of minimal approach are >0.3 Å, reducing the probability of side-feeding significantly.…”

Section: Discussionmentioning

confidence: 99%

Vanishing influence of the band gap on the charge exchange of slow highly charged ions in freestanding single-layer MoS2

et al. 2020

View full text Add to dashboard Cite

Charge exchange and kinetic energy loss of slow highly charged xenon ions transmitted through freestanding monolayer MoS 2 are studied. Two distinct exit charge state distributions, characterized by high and low charge states, are observed. They are accompanied by smaller and larger kinetic energy losses, as well as scattering angles, respectively. High charge exchange is attributed to two-center neutralization processes, which take place in close impact collisions with the target atoms. Experimental findings are compared to graphene as a target material and simulations based on a time-dependent scattering potential model. Independent of the target material, experimentally observed charge exchange can be modeled by the same electron capture and de-excitation rates for MoS 2 and graphene. A common dependence of the kinetic energy loss on the charge exchange for MoS 2 as well as graphene is also observed. Considering the similarities of the zero band-gap material graphene and the 1.9 eV band-gap material MoS 2 , we suggest that electron transport on the femtosecond timescale is dominated by the strong influence of the ion's Coulomb potential in contrast to the dispersion defined by the material's band structure.

show abstract