Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Burkhard Langer"'
Autor:
Christopher Raschpichler, Burkhard Langer, Eckart Rühl, Christina Graf, Christian Goroncy, Toralf Lischke, B. Wassermann, E. Antonsson, Patrick Klack
Publikováno v:
The Journal of Physical Chemistry C. 124:16663-16674
Wide-angle soft X-ray scattering on free silica particles of different porosity prepared in a beam is reported. The explored q region is mostly dominated by features due to surface roughness and bu...
Publikováno v:
The Journal of Physical Chemistry A. 122:2695-2702
The local chemical surface composition of unsupported mixed solid NaCl/Na2SO4 aerosols (d ∼ 70 nm) is studied by X-ray photoelectron spectroscopy. The solid aerosols are generated by drying aqueous droplets containing mixtures of the two salts in d
Publikováno v:
Physical chemistry chemical physics : PCCP. 21(23)
We report on asymmetric ion emission of size-selected NaCl nanoparticles (d = 100–600 nm) ionized by intense femtosecond laser pulses (λ = 800 nm, peak intensity ∼1013 W cm−2). Velocity map imaging indicates that a higher ion yield is observed
Autor:
Christina Graf, E. Antonsson, Christopher Raschpichler, Eckart Rühl, Mathias Gruner, Burkhard Langer, Christian Goroncy
Publikováno v:
Zeitschrift für Physikalische Chemie. 230:1249-1267
Elastic small-angle X-ray scattering (SAXS) of free silica (SiO2) nanoparticles is reported (d = 100–180 nm). The particles were prepared by a modified Stöber synthesis in narrow size distributions with controlled surface roughness and functionali
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 200:216-221
The ionization dynamics of free NaCl nanoparticles of 70 nm mean diameter is studied in a one-color pump-probe experiment using intense near-infrared femtosecond laser pulses. We find a significant delay dependence of the electron emission yield with
Autor:
H. Bresch, T. Leisner, Christina Graf, B. Wassermann, E. Antonsson, Eckart Rühl, Burkhard Langer, R. Lewinski
Publikováno v:
Chemical Physics Letters. 559:1-11
The use of nanoparticle beams for the preparation and characterization of isolated nanoscopic matter is reviewed. It is a general preparation scheme which is shown to be of broad use, whenever the intrinsic properties of nanoscopic matter without any
Publikováno v:
Physical Review A. 94
Elastic collisions between initially unpolarized electrons and hydrogenlike atoms are discussed aiming to analyze the entanglement properties of the correlated final spin system. Explicit spin-dependent interactions are neglected and electron exchang
Autor:
Burkhard Langer, Uwe Becker
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 601:78-87
Photoelectron spectroscopy as major tool for the study of the electronic structure of matter has been invented by Kai Siegbahn half a century ago. Since that time this field made an astonishing progress due to the development of more and more sophist
Autor:
R. Flesch, Christina Graf, R. Lewinski, Eckart Rühl, Burkhard Langer, B. Wassermann, H. Bresch
Publikováno v:
The European Physical Journal Special Topics. 169:67-72
Recent progress from experiments on clusters and free nanoparticles is reported, where emphasis is put on studies in the soft X-ray regime. We review selected examples on the characterization of free molecular clusters and nanoparticles. Specifically
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. :74-80
The charging mechanisms of free silica nanoparticles coated with a thin (40 nm) gold shell are investigated. These are excited in the soft X-ray regime at different photon energies. The results are compared to the charging behavior of neat silica par