TY  - JOUR
A1  - Pietsch, Ullrich
A1  - Barberka, Thomas Andreas
A1  - Geue, Thomas
A1  - Stömmer, Ralph
T1  - X-ray scattering from thin organic films and multilayers
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Stömmer, Ralph
A1  - Göbel, H.
A1  - Hub, W.
A1  - Pietsch, Ullrich
T1  - X-ray scattering from silicon surfaces
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Pietsch, Ullrich
A1  - Tsirelson, Vladimir G.
A1  - Gorfan, S. V.
T1  - X-ray scattering amplitude of an atom in a permanent external electric field
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Pietsch, Ullrich
A1  - Kubowicz, Stephan
A1  - Thünemann, Andreas F.
A1  - Geue, Thomas
A1  - Watson, M. D.
A1  - Tchebotareva, N.
A1  - Müllen, K.
T1  - X-ray reflectivity study of an amphiphilic hex-peri-hexabenzocoronene at a structured silicon wafer surface
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Geue, Thomas
A1  - Henneberg, Oliver
A1  - Pietsch, Ullrich
T1  - X-ray reflectivity from sinusoidal surface relief gratings
Y1  - 2002
SN  - 0023-4753
ER  - 
TY  - JOUR
A1  - Pietsch, Ullrich
T1  - X-ray reflectivity from sinusoidal surface relief gratings
Y1  - 2002
ER  - 
TY  - JOUR
A1  - Poloucek, P.
A1  - Pietsch, Ullrich
A1  - Geue, Thomas
A1  - Symietz, Christian
A1  - Brezesinski, Gerald
T1  - X-ray reflectivity analysis of thin complex Langmuir-Blodgett films
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Giewekemeyer, K.
A1  - Krueger, S. P.
A1  - Kalbfleisch, S.
A1  - Bartels, Meike
A1  - Beta, Carsten
A1  - Salditt, T.
T1  - X-ray propagation microscopy of biological cells using waveguides as a quasipoint source
JF  - Physical review : A, Atomic, molecular, and optical physics
N2  - We have used x-ray waveguides as highly confining optical elements for nanoscale imaging of unstained biological cells using the simple geometry of in-line holography. The well-known twin-image problem is effectively circumvented by a simple and fast iterative reconstruction. The algorithm which combines elements of the classical Gerchberg-Saxton scheme and the hybrid-input-output algorithm is optimized for phase-contrast samples, well-justified for imaging of cells at multi-keV photon energies. The experimental scheme allows for a quantitative phase reconstruction from a single holographic image without detailed knowledge of the complex illumination function incident on the sample, as demonstrated for freeze-dried cells of the eukaryotic amoeba Dictyostelium discoideum. The accessible resolution range is explored by simulations, indicating that resolutions on the order of 20 nm are within reach applying illumination times on the order of minutes at present synchrotron sources.
Y1  - 2011
U6  - https://doi.org/10.1103/PhysRevA.83.023804
SN  - 1050-2947
VL  - 83
IS  - 2
PB  - American Physical Society
CY  - College Park
ER  - 
TY  - JOUR
A1  - Toala, Jesús Alberto
A1  - Oskinova, Lida
A1  - Gonzalez-Galan, Ana
A1  - Guerrero, Martín A.
A1  - Ignace, R.
A1  - Pohl, Martin
T1  - X-RAY OBSERVATIONS OF BOW SHOCKS AROUND RUNAWAY O STARS. THE CASE OF zeta OPH AND BD+43 degrees 3654
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - Non-thermal radiation has been predicted within bow shocks around runaway stars by recent theoretical works. We present X-ray observations toward the runaway stars zeta Oph by Chandra and Suzaku and of BD+43 degrees 3654 by XMM-Newton to search for the presence of non-thermal X-ray emission. We found no evidence of non-thermal emission spatially coincident with the bow shocks; nonetheless, diffuse emission was detected in the vicinity of zeta Oph. After a careful analysis of its spectral characteristics, we conclude that this emission has a thermal nature with a plasma temperature of T approximate to 2 x 10(6) K. The cometary shape of this emission seems to be in line with recent predictions of radiation-hydrodynamic models of runaway stars. The case of BD+43 degrees 3654 is puzzling, as non-thermal emission has been reported in a previous work for this source.
KW  - stars: individual (zeta Oph, BD+43 degrees 3654)
KW  - stars: winds, outflows
Y1  - 2016
U6  - https://doi.org/10.3847/0004-637X/821/2/79
SN  - 0004-637X
SN  - 1538-4357
VL  - 821
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Oskinova, Lida
A1  - Feldmeier, Achim
A1  - Hamann, Wolf-Rainer
T1  - X-ray line profiles from structured stellar winds
N2  - Absorbing material compressed in a number of thin shells is effectively less opaque for X-rays than smoothly distributed gas. The calculated X-ray emission line profiles are red-shifted if the emission arises from the starward side of the shells.
Y1  - 2003
SN  - 1-58381-133-8
ER  -